Photoshop Restoration and Retouching by Katrin Eismann – New Riders Press
Don’t let the title fool you, this book really has a very broad scope Here are some of the chapter headings_ Correcting Tone, Exposure, and Color
Essential Restoration, Reparing, and Rebuilding
Portrauit Retouching
Rebuilding and Re-creating Images
And ech of these chapters is chock full of very concise examples which go right to the point of exploring the options available in color correction, using the various healing and cloning brushes, plus taking advanatge of some of the newr CS features for image correction. At $50 its a bit hefty in price, but the time and solutions proposed have already re-couped the cost for me. If you do any amount of Photoshop work I suspect you will find the same as well.