John O. E. Clark is an author, encyclopedist, and publisher. His scientific background naturally leads to an interest in the cartographic breakthroughs of such figures as Edmond Halley, Alexander von Humboldt, and William Smith.
Jeremy Black is Professor of History at the School of Historical, Political and Sociological Studies, Exeter University, England. His many books includeMaps and History: Constructing Images of the Past (Yale University Press) andMaps and Politics (University of Chicago Press).
Martin Marix Evans is the author of more than 20 titles and has spent a lifetime examining military maps. He contributed a number of the maps featured in this book. His books includeRetreat, Hell! We Just Got Here!: The American Expeditionary Force in France 1917-1918 (Osprey Publishing).