You know that I like the No Starch Press GIMP books – I even had my hand in the production of one of them. The other is always in reach at my desk. Over at Reddit there is a coupon code for getting 30% off of them – valid until May 6.
(I once got some $$$ and a crate of books from them for doing a technical review, but this is not paid by anyone for.)
Big thumbs up from me for the Book of Gimp – useful for non-Gimp users too.
Even if you are just considering Gimp this book is worth the money.
No connection with the authors or NoStarch but love their stuff.