Pass your cursor over the image to see the original—a scanned 40-year old color slide that had yellowed with age. It took less than 2 minutes to make corrections in Photoshop. Looking for a book? A search for "Photoshop" at Amazon.com returns 8,822 entries! Here are a few of the best.
Adobe Photoshop CS6 for Photographers
by Martin Evening
If you buy one book, this is the one you want. Finally, after all these years, a book that contains useful information for photographers!
Real World Camera Raw
by Bruce Fraser & Jeff Schewe
How to use Adobe Camera Raw by the folks who know.
Much of the material at this site can be found elsewhere. There are a few topics I suspect are original. At least I have yet to see them in print.
Curves, an important feature in Photoshop, have many applications. You may also be interested in some of my non-mainstream opinions.
You'll also find yet another color to B&W converter and a new way to paint with light.
To print individual pages, left-click on the page to give it focus then right-click and choose Print. You should be able to distinguish each of the patches in the following grayscale. If not, then you need to calibrate your monitor.