If you want to learn how to get the best out of this great piece of free software, then this is the book to read. It leads you gently by the hand through all the Gimp's features. Noteworthy is the section on Layers. I have in the past found Layers to be a difficult concept to get my head around. Akkana makes the concept so much easier to understand, and I am now using this feature regularly in my photo editing. I highly recommend this book.