Do you think the writer will be revealed, though?
myrosiedog, a metafictional book is a book that selfconsciously deals with fiction and literature in one way or another. In this case, the book in question is a work of metafiction since it is a work of fiction within a fiction. Metafictional novels are not a genre per se as much as a device most commonly used in postmodern novels. Paul Auster has written several metafictional novels, as has Bret Easton Ellis.
Hope my impromptu explanation made sense. And yeah, I am so buying this book!