[Berserker]

I've read a sort of scientific study on serial killers, but it's translated in dutch and I don't know the english title, pretty horrific stuff. I'm currently reading Anabolic Primer by Gerard Thorne (another study book about supplements don't bother reading).
If you're into horror you might want to check out some works of Barker or Herbert both are excellent writers.

I'll post more when I think of any.