The Book of GIMP: A Complete Guide to Nearly Everything By Olivier Lecarme and Karine Delvare No Starch PressJanuary 2013, 676 pp.US$49.95 print book with free e-book$39.95 e-book (PDF, Mobi, ePub)The ...

The Book of GIMP: A Complete Guide to Nearly Everything combines a step-by-step approach to learning how to use this epic graphic image-manipulation program with a handy reference manual supplemented ...

The Ultimate GIMP 2.10 Guide from Udemy is without a doubt the best Udemy course I've taken to date. It's also free, which makes it even better.

There is a bit of a learning curve, and that is where the new Book of GIMP: A Complete Guide to Nearly Everything by Olivier Lecarme and Karine Delvare comes in handy.