I've always been fascinated by serial killers. I think most people are, at some point, but when I was 12 years old I was so intrigued by the murders committed by Jack The Ripper that I had monthly mail-discussions with 50-year-old Englishmen on the matter. Now I've just ordered Michael Newton's "Century Of Slaughter", a book which (despite the awful title) has been applauded throughout the academic world. I found out about this one when browsing the FBI files on the "Silence Of The Lambs" DVD courtesy of Criterion. I also saw this page, listing a lot of known and unknown serial killers. It's so interesting!
It doesn't lead to anything useful? Hell, at least I know what I'll do if my future kids start torturing their pets and setting the house on fire. If they don't kill me first, of course.