Recommended book for Photoshop beginner?

[flyinion]

So I've stumbled around in CS3 enough to do some minor tweaking and learned a few things by searching for how to use tools like unsharp mask but I'd like to learn some of the more advanced stuff. Anyway have a recommended book for CS3? Right now I'm eyeing the "Dummies" book on Amazon. I looked at the table of contents and it seems like it hits the major stuff....layers, masks, filters, etc.

EDIT: oops looks like what I am looking at is Photoshop CS3 All-in-One Desk Reference For Dummies. Apparently a bit more detail in it than a "plain" "Dummies" book.