A fairly old book, this has as plausible an explanation as any I've read (and I've read a few). I'm not completely convinced, though I think the explanation put forward here is possibly the most well-researched and well-thought out of any. There are parts of it I agree with, such as the murderer only stopping because he died. There are also parts I disagree with completely, such as the idea that the murderer's first attempts were as successful as his later ones. No researcher seems to take any practice into account. I cannot believe that he did not make some mistakes when he first began to kill. A must-read for anyone interested.