I have moved from using Photoshop to using Gimp for processing my photographs. I was really wanting to know how Gimp differed from Photoshop as well as knowing how to get the best from Gimp. This book was excellent for that purpose, although no comparisons with photoshop are made. For people who have not previously used Photoshop or similar, some more discussion of the basics might be useful.
The chapters of the book are well thought out and mostly in the best order. The chapters for writing your own plug-ins or adapting the code for Gimp will be useful for those who understand programming or are willing to learn but it was lost on me. The book assumes you are using Gimp with the Linux operating system, but as Gimp will also run on Windows and Mac computers some more mention of the differences those users will experience would perhaps be useful.
This is a very useful, well written book, and I thoroughly recommend it.