Adobe Photoshop Classroom in a Book Published by Adobe Press.
Adobe Photoshop CS3 for Photographers, by Martin Evening.
Adobe Photoshop CS3 Studio Techniques, by Ben Willmore and Ben Long.
Adobe Photoshop Master Class by John Paul Caponigro. Published by Adobe Press. ISBN # 0-201-35499-3
Professional Photoshop the Classic Guide to Color Correction by Dan Margulis.
Real World Adobe Photoshop CS3 - David Blatner, Conrad Chavez, and Bruce Fraser