Photoshop Beginner

Well I’m not THAT much of a newbie but I’ve just got Photoshop CS2 and I’m thinking that I need to buy a book and my question to some of the insanely good Photoshoppers here is what book you might recommend?

I need a book that will teach me not only the interface but also what each filter, effects and blending modes will actually DO. I’ve noticed that most tutorials on the net are just like “Click here, enter this, apply this effect with these settings etc”. I want to actually *understand *what I’m doing! But also with some neat examples of effects I could use would be great too…

So yeah, any advice would be awesome guys. Thanks…