And Then I Thought I Was a Fish. After a bad LSD trip, a 20-something student can't sleep for two weeks, and as a result of the drug, the sleep deprivation, or both, he goes into psychosis. After a few months in this state, which include brief institutionalization which he ends by learning to fake recovery, he spontaneously wakes up sane one day. This is a first-hand account of the entire story, written 10 years after the fact. The author has very specific memories of what it felt like to be insane, which he's able to share convincingly. He tells us about his friends, roommates, crushes. He interviews people who interacted with him at the time and reports their impressions.

I couldn't put this book down. It's very well-written and utterly fascinating.