The book I got is "The Photoshop CS2 Book for digital photographers" by Scott Kelby.
I can't compare it to any other books as this is the only one I have on digital photography, but I like the authors style. He is pretty easy to read and he actually gives you his prefered settings on certain commands. It is not a basic book, as it assumes you are already familiar with layers.
All in all I like the book!
Cheers
good book, i have the same one and like it alot. i actually have another CS2 book, but don't even bother picking it up.