Mathematics of Discrete Structures for Computer Science

Practical Head and Neck Cytopathology provides an engaging and holistic approach to the cytologic diagnosis of head and neck masses, covering both the technique of needle aspiration and its microscopic interpretation. A suitable sample is critical for arriving at the diagnosis and this book provides organ-specific tips on the FNA technique. Presence of different organs and structures in the head and neck region, as well as morphologic overlap amongst disparate entities, adds to the complexity of cytologic diagnosis. This book presents an easy-to-follow, stepwise approach to diagnosis, using concise bulleted text to highlight key features. Common and infrequently encountered mimics are included and interpretative challenges are discussed, facilitating a robust diagnosis. Numerous high-quality photomicrographs aid recognition of both common and rare features. A valuable resource for trainee and practising pathologists alike, this book is based on universally-used techniques and routinely

Intraoperative neurophysiologic monitoring has shown a steady increase in use for surgeries in which neural structures may be at risk of injury. Some of the surgical techniques used carry inherent risks, and these risks have changed the way in which neurophysiologic monitoring has impacted patient safety and quality of care during surgical procedures. It is therefore crucial that those performing and interpreting intraoperative neurophysiologic monitoring are adequately trained. This book is a comprehensive guide to the current practice of intraoperative neurophysiology with chapters on various modalities and clinical uses. Separate chapters devoted to anesthesia, operating room environment, special considerations in pediatrics and the interpretation and reporting of neurophysiologic data are useful and complementary. Questions and detailed answers on the topics covered can be found on the accompanying website for study review. This book will be useful to the trainee as well as the neu

The World Ocean Assessment - or, to give its full title, The First Global Integrated Marine Assessment - is the outcome of the first cycle of the United Nations' Regular Process for Global Reporting and Assessment of the State of the Marine Environment, including Socioeconomic Aspects. The Assessment provides vital, scientifically-grounded bases for the consideration of ocean issues, including climate change, by governments, intergovernmental agencies, non-governmental agencies and all other stakeholders and policymakers involved in ocean affairs. Together with future assessments and related initiatives, it will support the implementation of the recently adopted 2030 Agenda for Sustainable Development, particularly its ocean-related goals. Moreover, it will also form an important reference text for marine science courses.

The second part of this two-volume set contains advanced aspects of the quantitative theory of the dynamics of neurons. It begins with an introduction to the effects of reversal potentials on response to synaptic input. It then develops the theory of action potential generation based on the seminal Hodgkin-Huxley equations and gives methods for their solution in the space-clamped and non-space-clamped cases. The remainder of the book discusses stochastic models of neural activity and ends with a statistical analysis of neuronal data with emphasis on spike trains. The mathematics is more complex in this volume than in the first volume and involves numerical methods of solution of partial differential equations and the statistical analysis of point processes.

The second part of this two-volume set contains advanced aspects of the quantitative theory of the dynamics of neurons. It begins with an introduction to the effects of reversal potentials on response to synaptic input. It then develops the theory of action potential generation based on the seminal Hodgkin-Huxley equations and gives methods for their solution in the space-clamped and non-space-clamped cases. The remainder of the book discusses stochastic models of neural activity and ends with a statistical analysis of neuronal data with emphasis on spike trains. The mathematics is more complex in this volume than in the first volume and involves numerical methods of solution of partial differential equations and the statistical analysis of point processes.

The author proposes an epistemological strategy to resolve controversial issues in the indigenous psychology (IP) movement. These include the nature of IPs, scientific standards, cultural concepts, philosophy of science, mainstream psychology, generalization of findings, and the isolation and independence of IPs. The approach includes a two-step strategy for construction of culture-inclusive theories, based on a Mandala model of self and a Face and Favor model for social interaction, and the use of these models to develop culture-inclusive theories for Confucian morphostasis. The author has successfully used this strategy, and encourages others to use it to construct their own culture-inclusive theories.

If you've ever spent hours renaming files or updating hundreds of spreadsheet cells, you know how tedious tasks like these can be. But what if you could have your computer do them for you? In this fully revised edition of the best-selling classic Automate the Boring Stuff with Python, you'll learn how to use Python to write programs that do in minutes what would take you hours to do by hand - no prior programming experience required. You'll learn the basics of coding in Python and explore the language's rich library of modules for performing specific tasks, like scraping data from websites, searching for text across multiple files, and merging, watermarking, or encrypting PDFs. The third edition includes: Expanded coverage of developer techniques, like creating command line programs; Updated examples and new projects; Additional chapters about working with SQLite databases, speech-recognition technology, video and audio editing, and text-to-speech capabilities; Simplified explanations

This book presents a unique method for decomposing a computer program along its execution paths, for simplifying the subprograms so produced, and for recomposing a program from its subprograms. This method enables us to divide and conquer the complexity involved in understanding the computation performed by a program by decomposing it into a set of subprograms and then simplifying them to the furthest extent possible. The resulting simplified subprograms are generally more understandable than the original program as a whole. The method may also be used to simplify a piece of source code by following the path-oriented method of decomposition, simplification, and recomposition. The analysis may be carried out in such a way that the derivation of the analysis result constitutes a correctness proof. The method can be applied to any source code (or portion thereof) that prescribes the computation to be performed in terms of assignment statements, conditional statements, and loop constructs,

This book may be used as a self-contained manual for BBC-BASIC, the main language of the BBC Microcomputer and Master Series Computers. Information is presented in a form handy for reference. Page 163, for example, tabulates all characters in the ASCII range; pages 124-5 summarize all information needed when composing screens of MODE 7 graphics. A quick reference to all functions and operators is given on page 179; the syntax of every statement and command of BBC-Basic is summarized on pages 180-1. But there is more to this book. How do you make a computer sort names into alphabetical order? Not as obvious as it might seem. Three different sorting techniques are explained by example in this book: bubble sort, monkey puzzle (more formally the 'binary tree') and Quicksort relies on 'recursion' - an important programming concept which is explained and demonstrated. Making coloured objects rebound around the walls of a squash court is another technique demonstrated; so is making voices sin

Originally published during the early part of the twentieth century, the Cambridge Manuals of Science and Literature were designed to provide concise introductions to a broad range of topics. They were written by experts for the general reader and combined a comprehensive approach to knowledge with an emphasis on accessibility. Cash and Credit by D. A. Barker was first published in 1910. It was intended to give the reader a firm grasp of the principles of finance and to provide a basis for the further study of monetary theory.

In this rich analysis of the changing ideals of citizenship, Stephen K. White offers a path for the renewal of democratic life in the twenty-first century. Looking beyond passive notions of citizenship defined in terms of voting or passport possession, White seeks a more aspirational portrait, both participatory and inclusive, that challenges citizens, especially in the middle class, to confront power structures to achieve greater justice. Using the Tea Party and followers of Donald Trump as foils, he shows how these groups' resentful and exclusivist conceptions of active citizenship undermine democratic aspirations. White explores how such deleterious influence might be effectively engaged by a robust counter-conception on the democratic left. The book makes this aspirational ideal conceptually clear, normatively compelling and aesthetically attractive.

In this rich analysis of the changing ideals of citizenship, Stephen K. White offers a path for the renewal of democratic life in the twenty-first century. Looking beyond passive notions of citizenship defined in terms of voting or passport possession, White seeks a more aspirational portrait, both participatory and inclusive, that challenges citizens, especially in the middle class, to confront power structures to achieve greater justice. Using the Tea Party and followers of Donald Trump as foils, he shows how these groups' resentful and exclusivist conceptions of active citizenship undermine democratic aspirations. White explores how such deleterious influence might be effectively engaged by a robust counter-conception on the democratic left. The book makes this aspirational ideal conceptually clear, normatively compelling and aesthetically attractive.

In this era of globalisation, different legal systems and structures no longer operate within their own jurisdictions. The effects of decisions, policies and political developments are having an increasingly wide-reaching impact. Nowhere is this more keenly felt than in the sphere of European Union law. This collection of essays contributes to the co-operative search for interpretative and normative grids needed in charting the contemporary legal landscape. Written by leading lawyers and legal philosophers, they examine the effects of law's de-nationalisation by placing European law in the context of transnational law and demonstrate how it forces us to rethink our basic legal concepts and propose an approach to transnational law beyond the dichotomy of national and international law.

This book, written entirely by hand, is an introduction to programming in Pascal. It starts with the fundamental concept of a stored program and works through to the manipulation of records in dynamic storage. The style of presentation is pictorial. This book may be used as a self-contained reference manual for Pascal to BS 6192 and ISO 7185. Besides defining the statements and structures of Pascal this book illustrates the use of such features in small but complete programs. These programs introduce fundamental techniques of programming such as symbol-state tables, bubble sort, quicksoft, stacks and queues, reverse Polish notation, linked lists, shortest-route technique, doubly linked rings, binary trees, hashing technique and other tools of the programmer's trade.

Numbers are part of our everyday experience and their properties have fascinated mankind since ancient times. Deciding whether a number is prime and if not, what its factors are, are both fundamental problems. In recent years analysis and solution of these problems have assumed commercial significance since large primes are an essential feature of secure methods of information transmission. The purely mathematical fascination that led to the development of methods for primality testing has been supplemented by the need to test within reasonable timescales, and computational methods have entered at all levels of number theory. In this book, Peter Giblin describes, in the context of an introduction to the theory of numbers, some of the more elementary methods for factorization and primality testing; that is, methods independent of a knowledge of other areas of mathematics. Indeed everything is developed from scratch so the mathematical prerequisites are minimal. An essential feature of t

The Episcopal Church has long been regarded as the religion of choice among America's ruling elite, helping to set the tone for the moral and social life of the nation during the twentieth century. Shaped by their experiences of the Great Depression and World War II, a new generation ofEpiscopal leaders emerged after 1945, eager to place their church in the vanguard of social reform and reconciliation. These liberal activists came to dominate the church's national structures during the 1960s and shaped its response to the civil rights and anti-war movements. They sought toreposition the Episcopal Church as a catalyst for progressive change. Even so, these leaders routinely neglected black, female, and working-class Episcopalians, even as they espoused the causes of equality and liberation in the wider society. This study focuses on forms of social activism and theological innovation pursued by members of the war generation. Attending to the development of such activities among the WASP

The extent to which language is inseparable from thought has long been a major subject of debate across linguistics, psychology, philosophy and other disciplines. In this study, Wallace Chafe presents a thought-based theory of language that goes beyond traditional views that semantics, syntax, and sounds are sufficient to account for language design. Language begins with thoughts in the mind of a speaker and ends by affecting thoughts in the mind of a listener. This obvious observation is seldom incorporated in descriptions of language design for two major reasons. First, the role of thought is usually usurped by semantics. But semantic structures are imposed on thought by languages and differ from one language to another. Second, thought does not lend itself to familiar methods of linguistic analysis. Chafe suggests ways of describing thoughts, traces the path languages follow from thoughts to sounds, and explores ways in which thoughts are oriented in time, memory, imagination, reali

The extent to which language is inseparable from thought has long been a major subject of debate across linguistics, psychology, philosophy and other disciplines. In this study, Wallace Chafe presents a thought-based theory of language that goes beyond traditional views that semantics, syntax, and sounds are sufficient to account for language design. Language begins with thoughts in the mind of a speaker and ends by affecting thoughts in the mind of a listener. This obvious observation is seldom incorporated in descriptions of language design for two major reasons. First, the role of thought is usually usurped by semantics. But semantic structures are imposed on thought by languages and differ from one language to another. Second, thought does not lend itself to familiar methods of linguistic analysis. Chafe suggests ways of describing thoughts, traces the path languages follow from thoughts to sounds, and explores ways in which thoughts are oriented in time, memory, imagination, reali

This two-volume course on abstract algebra provides a broad introduction to the subject for those with no previous knowledge of it but who are well grounded in ordinary algebraic techniques. It starts from the beginning, leading up to fresh ideas gradually and in a fairly elementary manner, and moving from discussion of particular (concrete) cases to abstract ideas and methods. It thus avoids the common practice of presenting the reader with a mass of ideas at the beginning, which he is only later able to relate to his previous mathematical experience. The work contains many concrete examples of algebraic structures. Each chapter contains a few worked examples for the student - these are divided into straightforward and more advanced categories. Answers are provided. From general sets, Volume 1 leads on to discuss special sets of the integers, other number sets, residues, polynomials and vectors. A chapter on mappings is followed by a detailed study of the fundamental laws of algebra,

Modern scientific computational methods are undergoing a transformative change; big data and statistical learning methods now have the potential to outperform the classical first-principles modeling paradigm. This book bridges this transition, connecting the theory of probability, stochastic processes, functional analysis, numerical analysis, and differential geometry. It describes two classes of computational methods to leverage data for modeling dynamical systems. The first is concerned with data fitting algorithms to estimate parameters in parametric models that are postulated on the basis of physical or dynamical laws. The second is on operator estimation, which uses the data to nonparametrically approximate the operator generated by the transition function of the underlying dynamical systems. This self-contained book is suitable for graduate studies in applied mathematics, statistics, and engineering. Carefully chosen elementary examples with supplementary MATLAB® codes and append

Many key phenomena in physics and engineering are described as singularities in the solutions to the differential equations describing them. Examples covered thoroughly in this book include the formation of drops and bubbles, the propagation of a crack and the formation of a shock in a gas. Aimed at a broad audience, this book provides the mathematical tools for understanding singularities and explains the many common features in their mathematical structure. Part I introduces the main concepts and techniques, using the most elementary mathematics possible so that it can be followed by readers with only a general background in differential equations. Parts II and III require more specialised methods of partial differential equations, complex analysis and asymptotic techniques. The book may be used for advanced fluid mechanics courses and as a complement to a general course on applied partial differential equations.

Many key phenomena in physics and engineering are described as singularities in the solutions to the differential equations describing them. Examples covered thoroughly in this book include the formation of drops and bubbles, the propagation of a crack and the formation of a shock in a gas. Aimed at a broad audience, this book provides the mathematical tools for understanding singularities and explains the many common features in their mathematical structure. Part I introduces the main concepts and techniques, using the most elementary mathematics possible so that it can be followed by readers with only a general background in differential equations. Parts II and III require more specialised methods of partial differential equations, complex analysis and asymptotic techniques. The book may be used for advanced fluid mechanics courses and as a complement to a general course on applied partial differential equations.

Seismic interferometry is an exciting field in geophysics utilising multiple scattering events to provide unprecedented views of the Earth's subsurface. This is a comprehensive book describing the theory and practice of seismic interferometry with an emphasis on applications in exploration seismology. Exercises are provided at the end of each chapter, and the text is supplemented by online MATLAB codes that illustrate important ideas and allow readers to generate synthetic traces and invert these to determine the Earth's reflectivity structure. Later chapters reinforce these principles by deriving the rigorous mathematics of seismic interferometry. Incorporating examples that apply interferometric imaging to synthetic and field data, from applied geophysics and earthquake seismology, this book is a valuable reference for academic researchers and oil industry professionals. It can also be used to teach a one-semester course for advanced students in geophysics and petroleum engineering.

Seismic interferometry is an exciting field in geophysics utilising multiple scattering events to provide unprecedented views of the Earth's subsurface. This is a comprehensive book describing the theory and practice of seismic interferometry with an emphasis on applications in exploration seismology. Exercises are provided at the end of each chapter, and the text is supplemented by online MATLAB codes that illustrate important ideas and allow readers to generate synthetic traces and invert these to determine the Earth's reflectivity structure. Later chapters reinforce these principles by deriving the rigorous mathematics of seismic interferometry. Incorporating examples that apply interferometric imaging to synthetic and field data, from applied geophysics and earthquake seismology, this book is a valuable reference for academic researchers and oil industry professionals. It can also be used to teach a one-semester course for advanced students in geophysics and petroleum engineering.

This book, first published in 2004, is a genuine introduction to the geometry of lines and conics in the Euclidean plane. Lines and circles provide the starting point, with the classical invariants of general conics introduced at an early stage, yielding a broad subdivision into types, a prelude to the congruence classification. A recurring theme is the way in which lines intersect conics. From single lines one proceeds to parallel pencils, leading to midpoint loci, axes and asymptotic directions. Likewise, intersections with general pencils of lines lead to the central concepts of tangent, normal, pole and polar. The treatment is example based and self contained, assuming only a basic grounding in linear algebra. With numerous illustrations and several hundred worked examples and exercises, this book is ideal for use with undergraduate courses in mathematics, or for postgraduates in the engineering and physical sciences.

Classical string theory is concerned with the propagation of classical 1-dimensional curves 'strings', and the theory has connections to the calculus of variations, minimal surfaces and harmonic maps. The quantization of string theory gives rise to problems in different areas, according to the method used. The representation theory of Lie, Kac-Moody and Virasoro algebras have been used for such quantization. In this lecture note the authors give an introduction to certain global analytic and probabilistic aspects of string theory. It is their intention to bring together, and make explicit the necessary mathematical tools. Researchers with an interest in string theory, in either mathematics or theoretical physics, will find this a stimulating volume.

Graduate students in many branches of mathematics need to know something about topological groups and the Haar integral to enable them to understand applications in their own fields. In this introduction to the subject, Professor Higgins covers the basic theorems they are likely to need, assuming only some elementary group theory. The book is based on lecture courses given for the London M.Sc. degree in 1969 and 1972, and the treatment is more algebraic than usual, reflecting the interests of the author and his audience. The volume ends with an informal account of one important application of the Haar integral, to the representation theory of compact groups, and suggests further reading on this and similar topics.

Ladybird Do You Know? is a STEM-based ELT graded reading series recommended for children aged 5+ who are learning English as a foreign or second language. These levelled non-fiction books feature video content, project work and critical-thinking activities. Each book asks a range of BIG questions on STEM topics from nocturnal animals to building bridges, developing children's language, communication and investigation skills.The five levels progress from CEFR Pre-A1 to A2. Visit the Ladybird Education website for online video content, audio, comprehension activities, and suggestions for project work. Viruses and Bacteria, a Level 4 Reader, is A2 in the CEFR framework and supports YLE Flyers exams.The longer text is made up of sentences with up to three clauses, more complex past and future tense structures, modal verbs and a wider variety of conjunctions. Why do we get colds? Can we grow bacteria? What are antibiotics? Find out more about cells, Petri dishes and Penicillin.

For intermediate and advanced crafters, these eight illustrated loom weaving projects help you create sustainable, attractive, and useful textile pieces for your home and wardrobe―or to give as gifts. This step-by-step guide to weaving large projects on a little loom is packed with over 200 color photographs.Use your frame loom to create eight large, impactful weaving projects, including an oversized scarf, a snood, a shoulder bag, a mesh shopping bag, a bathroom mat, a table runner, and two types of cushions. With straightforward instructions, weave patterns, and vivid color photography, this helpful how-to guide leads you through each step of these inspired projects.First, choose your materials, focusing on finding the best, most sustainable textiles and yarns for your project. Next, learn about a special type of frame loom with a detachable top and bottom bar that will enable you to create pieces up to six and a half feet in length. Learn how to create 8 different weave structures,

T. M. Flett was a Professor of Pure Mathematics at the University of Sheffield from 1967 until his death in 1976. This book, which he had almost finished, has been edited for publication by Professor J. S. Pym. This text is a treatise on the differential calculus of functions taking values in normed spaces. The exposition is essentially elementary, though on are occasions appeal is made to deeper results. The theory of vector-valued functions of one real variable is particularly straightforward, and this forms the substance of the initial chapter. A large part of the book is devoted to applications. An extensive study is made of ordinary differential equations. Extremum problems for functions of a vector variable lead to the calculus of variations and general optimisation problems. Other applications include the geometry of tangents and the Newton-Kantorovich method in normed spaces. The three historical notes show how the masters of the past (Cauchy, Peano…) created the subject by exa

The internet has altered how people engage with each other in myriad ways, including offering opportunities for people to act distrustfully. This fascinating set of essays explores the question of trust in computing from technical, socio-philosophical, and design perspectives. Why has the identity of the human user been taken for granted in the design of the internet? What difficulties ensue when it is understood that security systems can never be perfect? What role does trust have in society in general? How is trust to be understood when trying to describe activities as part of a user requirement program? What questions of trust arise in a time when data analytics are meant to offer new insights into user behavior and when users are confronted with different sorts of digital entities? These questions and their answers are of paramount interest to computer scientists, sociologists, philosophers and designers confronting the problem of trust.

Finite geometry and combinatorics is the art of counting any phenomena that can be described by a diagram. Everyday life is full of applications; from telephones to compact disc players, from the transmission of confidential information to the codes on any item on supermarket shelves. This is a collection of thirty-five articles on covering topics such as finite projective spaces, generalized polygons, strongly regular graphs, diagram geometries and polar spaces. Included here are articles from many of the leading practitioners in the field including, for the first time, several distinguished Russian mathematicians. Many of the papers contain important new results and the growing use of computer algebra packages in this area is also demonstrated.

This book is a readable, digestible introduction to exponential families, encompassing statistical models based on the most useful distributions in statistical theory, including the normal, gamma, binomial, Poisson, and negative binomial. Strongly motivated by applications, it presents the essential theory and then demonstrates the theory's practical potential by connecting it with developments in areas like item response analysis, social network models, conditional independence and latent variable structures, and point process models. Extensions to incomplete data models and generalized linear models are also included. In addition, the author gives a concise account of the philosophy of Per Martin-Löf in order to connect statistical modelling with ideas in statistical physics, including Boltzmann's law. Written for graduate students and researchers with a background in basic statistical inference, the book includes a vast set of examples demonstrating models for applications and exerc

This book is a readable, digestible introduction to exponential families, encompassing statistical models based on the most useful distributions in statistical theory, including the normal, gamma, binomial, Poisson, and negative binomial. Strongly motivated by applications, it presents the essential theory and then demonstrates the theory's practical potential by connecting it with developments in areas like item response analysis, social network models, conditional independence and latent variable structures, and point process models. Extensions to incomplete data models and generalized linear models are also included. In addition, the author gives a concise account of the philosophy of Per Martin-Löf in order to connect statistical modelling with ideas in statistical physics, including Boltzmann's law. Written for graduate students and researchers with a background in basic statistical inference, the book includes a vast set of examples demonstrating models for applications and exerc

Ethnic conflict often focuses on culturally charged symbols and rituals that evoke strong emotions from all sides. Marc Howard Ross examines battles over diverse cultural expressions, including Islamic headscarves in France, parades in Northern Ireland, holy sites in Jerusalem and Confederate flags in the American South to propose a psychocultural framework for understanding ethnic conflict, as well as barriers to, and opportunities for, its mitigation. His analysis explores how culture frames interests, structures demand-making and shapes how opponents can find common ground to produce constructive outcomes to long-term disputes. He focuses on participants' accounts of conflict to identify emotionally significant issues, and the power of cultural expressions to link individuals to larger identities and shape action. Ross shows that, contrary to popular belief, culture does not necessarily exacerbate conflict; rather, the constructed nature of psychocultural narratives can facilitate

Ethnic conflict often focuses on culturally charged symbols and rituals that evoke strong emotions from all sides. Marc Howard Ross examines battles over diverse cultural expressions, including Islamic headscarves in France, parades in Northern Ireland, holy sites in Jerusalem and Confederate flags in the American South to propose a psychocultural framework for understanding ethnic conflict, as well as barriers to, and opportunities for, its mitigation. His analysis explores how culture frames interests, structures demand-making and shapes how opponents can find common ground to produce constructive outcomes to long-term disputes. He focuses on participants' accounts of conflict to identify emotionally significant issues, and the power of cultural expressions to link individuals to larger identities and shape action. Ross shows that, contrary to popular belief, culture does not necessarily exacerbate conflict; rather, the constructed nature of psychocultural narratives can facilitate

This latest Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) will again form the standard reference for all those concerned with climate change and its consequences, including students, researchers and policy makers in environmental science, meteorology, climatology, biology, ecology, atmospheric chemistry and environmental policy.

This latest Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) will again form the standard reference for all those concerned with climate change and its consequences, including students, researchers and policy makers in environmental science, meteorology, climatology, biology, ecology, atmospheric chemistry and environmental policy.

This latest Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) will again form the standard reference for all those concerned with climate change and its consequences, including students, researchers and policy makers in environmental science, meteorology, climatology, biology, ecology, atmospheric chemistry and environmental policy.

For Dr. David Beck, the loss was shattering. And every day for the past eight years, he has relived the horror of what happened. The gleaming lake. The pale moonlight. The piercing screams. The night his wife was taken. The last night he saw her alive. Everyone tells him it's time to move on, to forget the past once and for all. But for David Beck, there can be no closure. A message has appeared on his computer, a phrase only he and his dead wife know. Suddenly Beck is taunted with the impossible-that somewhere, somehow, Elizabeth is alive. Beck has been warned to tell no one. And he doesn't. Instead, he runs from the people he trusts the most, plunging headlong into a search for the shadowy figure whose messages hold out a desperate hope. But already Beck is being hunted down. He's headed straight into the heart of a dark and deadly secret-and someone intends to stop him before he gets there.