Linda Waide, MSN, MEd, RN, and Berta Roland, MSN, RN, are the coauthors of The Chicago Review Press NCLEX-PN Practice Test and Review, The Chicago Review Press Pharmacology Made Easy for NCLEX-PN Review and Study Guide, and The Chicago Review Press Pharmacology Made Easy for NCLEX-RN Review and Study Guide. They are the owners of Contemporary Health Systems, Incorporated, which has offered nursing review courses for both the RN and PN licensure examinations for more than 15 years nationwide. They both live in Talladega, Alabama.