The Art of War: A Memoir of Life in Prison with Mafia, Serial Killers, and Sex Offenders Who Get Stabbed, is one of the few realistic prison stories out there, as author Glenn Langohr has experienced this world himself. This story brings you into the world of prison alliances and the consequences for sex offenders; prison life is a war zone complete with military strategy. I have lived this life and will be the first to say how credible this account is. I’m very impressed with the author’s rise from prison to published author. That’s a rare accomplishment.