Good book, don't toss Photoshop CS software !
I believe Photoshop CS was the last version of Photoshop which had liberal licensing, in that if you had 10 PC's at home, you could install it on all 10 of them successfully, the installation procedure didn't go out to Adobe and confirm the license in a licensing database. SO, the Photoshop CS install CD is worth it's weight in gold, and with the rock-bottom cost of Photoshop CS books like this one, it pays to keep Photoshop the Photoshop CS install CD around. This book is the official real deal from Adobe Press.