2. At present, it is better to combine these three functions: photoshop 6 image password and PhotoHP 7 image decoding.
Both books are the same author, and the ideas in the books are all around the three concepts of "layer, channel and selection area (mask)". The difference is that the example in "Photo HP 7 Interpretation" is more mature.
Both books require readers to pay more attention to the in-depth understanding and application of the three concepts of photoshop, instead of getting lost in the sea of photoshop commands from the beginning.
Supplementary note: Of course, after learning the examples in the above books, you must be a master of photoshop. The most important thing to learn photoshop is to practice, practice, think and extend the application of the learned functions.