Adobe Photoshop CS4 How-Tos: 100 Essential Techniques

CS4 didn't complete changed the game, so if you're familiar with previous Photoshops, you should be good. This book does give good advice for Photoshop in general. It's not as humorous as Scott Kelby, but very straightforward. I purchased this for a digital photo editing class, and didn't read all of it, but what I read was pretty helpful. It's good to reference occasionally even for a Photoshop junkie like myself. You never know when you can learn a new trick!

Purchased this for my daughter. She said it helped her to navigate and understand the process.