How to Do Everything Adobe Photoshop CS4 - This is a real hands-on
book that will teach you CS4 in a thorough, clear and concise fashion. All aspects are covered from layering to filters and from special effects to establishing a basic workflow. It is taught by an Adobe Certified Instructor.
About the Author: Chad Perkins is an Adobe Certified Instructor, an Adobe Certified Expert, and the author of several books and training videos.