This is the second Stevens novel I read (the first being The Anvil Chorus) and both of them go in absolutely different paths. "Anvil" is written in a suspense-thriller type way much in the tradition of the contemporary greats of that genre, whereas "Insanity" goes on a completely different path. It has hooked me. I haven't finished it yet but as far as I have read it, I can already put it down and recommend it, just like Stephen King said, to "readers who have strong stomachs". Thomas Bishop, the killer in this book, is like a fictionalized version of Jeffrey Dahmer, the Wisconsin Cannibal. Yet we must be reminded of the following...this book was published in the 70's...Dahmer only became notorious much later. If anything, I think Stevens based himself on "Headhunter" Ed Kemper to create Thomas Bishop. Kemper's crimes were horrific brutal and senseless, and he had murdered his parents (although Bishop only murdered his mother)Perhaps I am wrong in my assumptions as to who Thomas Bishop was based on. But one thing I am not wrong about is the fact that this is to be considered a masterpiece in gruesome and graphic horror, and a must read.