Odyl, a New York-based company that works with publishers to create Facebook campaigns for books, has built a new social discovery tool for books called Riffle.

Riffle, which is currently in beta, lets readers share and discover books with friends. Though details about the tool are limited, the website has sign-up details: “Riffle is about books. Get inspired and read more.” To get an invite, follow this link.

AppNewser has more about Odyl: “Odyl has created a number of Facebook campaigns for books including Confessions of a Guidette photo contest which Simon & Schuster used to promote Snooki’s book, as well as a Facebook page for HarperCollins’ Vampire Diaries books.”