Mr. Untouchable by Leroy "Nicky" Barnes. Autobiography of a major drug dealer in the 70s who bought his dope from the mob. Had interactions with mobsters such as Matthew Madonna, Joey Gallo, Carmine Galante and Mark Reiter from John Gotti's crew. This was a really well written and entertaining book. I powered through it in a few days. Barnes is an intelligent guy but also has a huge ego. Really interesting reading how things are at a boss level, breaking down how the whole organization works.