Killer Novels

I'm looking for novels about murderers or serial murderers told from the viewpoint of the murderer.  Preferably Psychological Thrillers.

Ah. If only I'd seen this thread earlier.  Richard Laymon might be up your alley.  Check out 'Endless Night'.  The guy's a damn genius.  Unappreciated in his time, sadly enough.  Twenty years from now people will talk about him the way we talk about Jim Thompson and Raymond Chandler.