Can anyone recommend novels about serial killers? I have read the first two of Chelsea Cain's novels. Also, in the 1970s, there was a paperback thriller about a female serial killer called "Jill" or something like that. I was wondering if there were more books like that? (Or if anyone knows the book I'm thinking of because it's hard to find a novel on Amazon if all you remember is what you think the title was, what it sort of looked like, and the decade you thinkit came out.

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True crime recommendations will work, too. I have Peter Vronsky's book on female serial killers, and it's very interesting. There are more than you think, and in some ways, they are often scarier than their male counterparts.
P.S. I was tempted with Edward Lee's Portrait of the Psychopath as a Young Woman. Previously only available in a limited press edition, it is now on SmashWords. Has anyone read this?
http://www.smashwords.com/books/view/16776