The images in this book were well done and impressive. Unfortunately I was not as impressed with the Photoshop (PS) techniques. The authors acknowledge that there are many ways to accomplish the same things in PS and theirs is only one, which is true, but often there are more efficient and well known ways to accomplish something. For instance, they use multiple copies of the same Camera Raw file at different exposures instead of simply using a file with multiple smart object layers. That doesn't make any sense, and is definitely the hard way to do it. They do this with several examples, and complicated painting layers. It wore me out just reading it.
I started to get excited when they were discussing blending modes, because they had a well-done graphic showing white, gray, and black and how the different blending modes affect the layer. Unfortunately they only covered four blending modes.
Then there's the dodging and burning example. They don't like the dodge and burn tool. Everyone says the dodge and burn tool used to be really awful, but now with the "protect tones" option it works just fine. Instead they add a duplicate layer with either a screen blending mode to lighten, or a multiply blending mode to darken, then add a layer mask and paint in where they want to dodge and burn. Okay, so yes it works, but seems complicated.
They have this lovely example of a stacked star trails photo, where they use separate stacking software to accomplish. Again, why complicate it. Select the files in Bridge, choose load in Photoshop as layers, then change the blending modes to screen.
Their discussion of LAB mode was interesting, and the way they use it to modify color is dramatic. Unfortunately that was the only strong point in the book. They said they had a Photoshop action at their website that you could download. I went and checked it out. I downloaded all 5 downloads, and there was no action, just images. They weren't even layered images, if they had been layered, you could have seen what had been done.
If this were a really old book, I'd be more understanding, but it's only one year old.
If you are interested in post production work I suggest
Adobe Photoshop CS5 for Photographers: a professional image editor's guide to the creative use of Photoshop for the Macintosh and PC instead. It is easier to follow, more thorough, and uses techniques that are more efficient while still achieving the same results.