Which photoshop book should i get?

I have a limited choice of books in English where I am and i want a decent photoshop 7 book. My choices are

Photoshop 7 Fast and Easy

Photoshop 7 for dummies

Photoshop power shortcuts

The Photoshop 7 bible (professional edition)

I've played around with photoshop and done minor things like replace colours and remove unwanted background items with the clone tool, but i am sure i have only used about 1/2% of photoshops power.

Reccomendations?

Thanks

Which photoshop book should i get?pc security

if u are learning on your own then

Photoshop for dummies and The Photoshop 7 bible (professional edition)

if working in a team or taking coaching from somewhere then

The Photoshop 7 bible (professional edition)