Brian Kessler: I’d always wanted to be a writer, but there’s a big difference between writing a magazine article and writing a book. I know I wrote a magazine article. Everything I ever wanted to know about serial killers fit nicely on those four pages. The article got me a book deal with a little cash up front, but between the rent and the convertible the advance was gone. I owed a book and I was stuck. What little I knew about serial killers I learned in a university library. The only thing I knew for certain was that people didn’t kill each other in libraries.