Psychiatrist, Stephen Seager, wrote The Gates of Gomorrah about his year working in Napa at a psychiatric facility. The patients at this facility had all committed terrible crimes (mainly murders), and were perceived as mentally ill either during the crime or at the time of punishment. The most interesting part is that Gomorrah still runs as a hospital, in that there are no guards, and patients are free to roam the halls with the doctors and nurses.
This did book start off quite slow for me. It was hard for me to keep track of the different personalities but once I caught up, I found myself wanting to read more. Seager's time at Gomorrah sounds terrifying, but there were some valuable lessons about human psychology and sociology which can be taken from his memoir.
I definitely recommend this book, it makes for a fascinating - suspenseful read - just take your time at the beginning to get a sense of the characters.