I owe you a recommendation (or more) for your suggestion that I read Joanne Harris's Gentlemen & Players a while back. In roughly the same genre, you might take a look at The Rule of Four (http://amzn.to/1MAvmSK), The Thirteenth Tale (http://amzn.to/1Rw1rPZ), and Mr. Penumbra's 24-Hour Bookstore (http://amzn.to/1Rw1N9l).
Hope all is well!