This book is actually an adaptation of the documentary, which is available on Amazon Prime. The book was something like two dollars on Audible, which is the copy I have. I turned this on and listened to it while folding laundry, so that was a useful way to multitask. Broadmoor is a well known facility that housed the criminally insane. Many notable murderers were kept here, including Peter Sutcliffe (The Yorkshire Ripper), David Copeland (The London Nail Bomber), Ronnie Kray, and Ian Ball (who attempted to kidnap Princess Anne). Broadmoor also has a history for the amount of breakthrough treatments and psychiatric care of the times. Even though this was a short little book, it was very interesting. I plan to watch the documentary as well.