The prize: Night Life by Elizabeth Guest
Unlike the first two books, I haven't read this one so I don't know if it's a good one or not. But I have seen good reviews for it and my own copy is on the short list of books I have to get to from the TBR pile.
The rules: (now that I'm starting to get the hang of it) A clue a day until someone guesses the book.
Who can enter: Anyone, anywhere who thinks they might know the book.