The Barron’s Test Prep Ser.: Police Officer Exam Flash Cards by Donald J. Schroeder is a comprehensive study aid focused on the police officer exam. Published by Kaplan Publishing in 2017, this textbook features flashcards in English language. With a total of 503 pages, this study guide covers various subject areas such as study aids, political science, and law enforcement. It is a valuable resource for individuals looking to prepare for professional civil service exams and learn more about the requirements for becoming a police officer.