Before you head to the book store or download a novel to your Kindle, check out our guide to reviews of the hottest new books to hit shelves. Dying to read the latest celebrity-penned novel or autobiography? Discover fiction and non-fiction titles from celebrity writers, including Drew Barrymore and Pharrell Williams. Plus: Get the latest news about best-sellers that are being made into movies. Of course this is InStyle, so we're also bringing you reviews of the moment's most important fashion books.