I've gone through many Photoshop books, since starting with ver. 5, and while "specialized" books such as "Real World PS, Photoshop Artistry, etc. are exellent in their own rite, I've found none better, not only for effects, but for a general knowledge of the program, than "The Photoshop WOW Book/s by Linnea Dayton & Jack Davis!
They,ve been doing them for a long time, and they are thourough, very well organized and easy to understand.
Because Photoshop 7 is so similar to 6, they haven't
( To the best of my knowledge) done a PS 7 WOW Book; but though I have 7.1, I still bought the PS 6 WOW Book, and don't feel I've missed anything.
Leigh