It's a great book for engineers working with color, as its principles are explained through color theory and the mathematical relationships between colors.
Most photoshop 'experts' are people who have dicked around with it forever and just haphazardly learned the tools, Margulis comes from a much more empirical place and shows how to manipulate color in ways that are more natural and less damaging to images by using as few tools as possible.
Additionally, you'll learn a ton about color theory, which is worthwhile by itself.
That is, indeed, good material, but I suspect that OP is probably better served by content that addresses how to draw with vectors, use layer styles, etc. That stuff is the juice for making UI elements and mockups.
It's a great book for engineers working with color, as its principles are explained through color theory and the mathematical relationships between colors.
Most photoshop 'experts' are people who have dicked around with it forever and just haphazardly learned the tools, Margulis comes from a much more empirical place and shows how to manipulate color in ways that are more natural and less damaging to images by using as few tools as possible.
Additionally, you'll learn a ton about color theory, which is worthwhile by itself.
If you finish that book, this one is awesome as well: http://www.amazon.com/Photoshop-LAB-Color-Adventures-Colorsp...