So this isn't a very special textbook. It's pretty standard in truth except for the fact that the information in this book required me to reread it a few times. I'm not sure why it was so difficult for me to absorb the information but it was probably due to how technical and varied the information could be at times. If you're interested in getting this book, I would rent or buy a cheap copy from someone who already has it. Personally I wouldn't keep it on my reference shelf, but I can't find anyone who needs it.
I would recommend it to those wanting to learn about mobile web development but be aware you might not easily absorb the information or like this book. It can be useful but it's just a classic textbook that I probably won't remember in a few years.