Very good reference manual - its all here in one book...what I liked the most is the fact that I don't have to buy two or three books to get my questions answered - EVERYTHING is here! Sure, its a big book, but its all there!!!
Finally I can use GIMP without going back to the internet to look up some 'how to' answer on some forum and waste hours trying to find out how to do something...I just look it up here, and presto, I can carry on.
If you use GIMP, GET THIS BOOK!!! You'll find it will answer any question you have and get your projects done faster and BETTER then trying to figure it out for yourself.