Just ordered this off Amazon for ~6.50. The Last Podcast on the Left recommended it and I've been pretty intrigued by John Wayne Gacy. Does /lit/ have any recommendations for true crime books?
If you're into Serial Killers, the only Serial Killer True Crime book I could ever seeing myself recommending to anyone is The Stranger Beside Me by Ann Rule. It's the strongest book on Ted Bundy I've ever read. It's the personal account of Ann Rule, who knew Bundy personally since college and worked with him at a suicide hotline. They maintained correspondence right up until Bundy's execution. After her relationship with Bundy she became a true crime writer, but this is the only book of hers most people have ever heard of. Still, it's really the apex of serial killer lit.
Though as >>7640586 mentions, In Cold Blood by Truman Capote, one of the key figures of the New Journalism movement (along with Hunter S. Thompson), is really the key book of this genre.