I've set a deadline for myself to have a book proposal for the mammoth book complete by next week, not counting the perfect polished chapter. This is turning out to be much harder than I thought. I'm terrible at selling myself. However, it has been a very useful exercise to help me clarify the organization of the book in my own mind. Brian Switek of the blogs Laelaps and Dinosaur Tracking, has been good enough to give me some very helpful advice. If you aren't reading his blogs, you should, and if you have not yet bought his first book, you should. It's now available as an e-book.