I'm thinking of heading to the bookstore this weekend (or Amazon.com) to buy a Photoshop book. I like having a physical reference in addition to the great tutorials available on the web (here and elsewhere). The ideal book for me would be a mix of basic reference and tips/tricks. I have a couple of these books already made for previous editions of Photoshop (7, CS3), but now that I've upgraded to CS6 and now that my interest has been re-ignited by this site, I may be willing to plop down another $30-50 for a new version.

Anyone have books or authors that they swear by?