How Do You Write a Serial Killer Book?

If you were to go back to one of your older books, do you rewrite? Blerbs or, oh, yes, take but do you take one and tinker with it? Or would you in or in my situation, would you say, start from a blank page. Don't don't tinker with the one youave already written. Cut us out with a blank page and start afresh. So would you? I mean, you oslyve been writing for many years now. But is this a sort of fresh page approach might be better?