Re: Hi! New to Photoshop CS4
I myself have never read any books on Photoshop. I just started picking things up from reading tutorials and watching videos.
I would highly recommend the Photoshop User TV podcast.
www.photoshopusertv.com It's one of my favorite podcasts.
If you are looking for a certain book, the "Dummy" books are usually pretty good and all of the guys who host Photoshop User TV have their own books that I hear a pretty good. Those authors would be Scott Kelby, Matt Klowskowski, and Dave Cross.
Best of luck with the new program!