I first suggested we do something like this to my editor, the redoubtable Jennifer Hershey, about a year ago, while the book was still being written (a process that continued until about 3 weeks ago). She preferred to wait until the book was on the conveyor belt to actual publication, thus sparing the reading world lots of entries like "Feb 13th: wrote some stuff. It was crap." and "Feb 14th: wrote some brilliant stuff. This is going to be such a good novel. Honest it is." followed by "Feb 15th. no, it's crap" and so on. It was a bit like wrestling a bear. Some days I was on top. Most days, the bear was on top. So you missed watching an author staring in bafflement as the manuscript got longer and longer, and the deadlines flew about like dry leaves in a gale, and the book remained unfinished.