This book has been as much fun to read as the books from "head first..." series.
Don't be afraid of the number of pages - most of the pages are filled with pictures, and a few fun and witty comments here and there to spice things up a little. There is also "in-depth" material, but fortunately it is well-hidden among all the interesting stuff.
After reading this book, you'll regret two things: 1. all the time you've spent on the powerpoint presentations (is all wasted now, and you know it) 2. that you don't have a tablet laptop (well, I didn't)
Very complex ideas become simple once conveyed in pictures (or with powerful pictures) - that's what this book teaches. Now the only thing I need is draw a picture, but this is a text-only field... :)