Robert Christensen’s Out of the Darkness and into the Blue: Surprising Secrets, Tactics, and Training Concepts: A Memoir from One of Kalamazoo’s Top Cops
https://www.amazon.com/Out-Darkness-into-Blue-Surprising/dp/1495301052
Miles Corwin’s The Killing Season: A Summer inside an LAPD Homicide Division
https://www.amazon.com/Killing-Season-Miles-Corwin/dp/0345483006
Patrick Radden Keefe’s The Snakehead: An Epic Tale of the Chinatown Underworld and the American Dream
https://www.amazon.com/Snakehead-Chinatown-Underworld-American-Dream/dp/0307279278?
Lee Lofland’s Police Procedure & Investigation: A Guide for Writers
https://www.amazon.com/Police-Procedure-Investigation-Writers-Howdunit/dp/1582974551
Moisés Naím’s Illicit: How Smugglers, Traffickers, and Copycats Are Hijacking the Global Economy
http://www.amazon.com/Illicit-Smugglers-Traffickers-Counterfeiters-Hijacking-ebook/dp/B000MAH5NS/
Steve Osborne’s The Job: True Tales from the Life of a New York City Cop (and for God’s sake, if you like audiobooks, listen to Osborne read this one in that tailor-made New York accent!).
https://www.amazon.com/Job-True-Tales-Life-York/dp/1101872144
Adam Plantinga’s 400 Things Cops Know: Street-Smart Lessons from a Veteran Patrolman
https://www.amazon.com/400-Things-Cops-Know-Street-Smart/dp/1610352173
David Simon’s Homicide: A Year on the Killing Streets
https://www.amazon.com/Homicide-Killing-Streets-David-Simon/dp/0805080759
Maija Soderholm’s The Liar the Cheat and the Thief: Deception and the Art of Sword Play
https://www.amazon.com/Liar-Cheat-Thief-Deception-Sword/dp/1505407672/ref=sr_1_1
Randy Sutton’s True Blue: Police Stories by Those Who Have Lived Them
http://www.amazon.com/True-Blue-Police-Stories-Those/dp/1250051258/ref=pd_bxgy_14_img_2
Alice Vachss’s Sex Crimes: Ten Years on the Front Lines Prosecuting Rapists and Confronting Their Collaborators
https://www.amazon.com/Sex-Crimes-Prosecuting-Confronting-Collaborators-ebook/dp/B01FTBDKJM