I just managed to finish Gone Girl by Gillian Flynn. It is really an excellent read. The title like a lot of things in the book has a double meaning. It is hard to talk about the book without ruining the experience, so I can't really say much about the novel without ruining the surprise. It is the sort of book that you will get to the end of and immediately want to talk about.
There is a forthcoming film, however from what I have read about it, they have changed the ending of the book.