Lee, that totally SUCKS. If it's any consolation, I'm in the same boat and my agent said not to write the book off forever. There's always the chance that you'll sell something else and then be able to get your editor to look at the other book. It's happened to a couple of people I know. I hope you're taking some time for self care. It really is a kind of grieving process and is not to be taken lightly when you've poured so much into a project and gotten so close. Sending you hugs.