It seemed like a good idea at the time. Maybe I have a much later version than described in the book, but I found that most of the examples didn't work very well. Some were clearly broken; others did something but I couldn't quite tell what or apply the lesson to anything else.I did learn a bit, but I still can't really apply much of what I learned. Some of the things seem useful, but but until I can figure out how to get gimp to actually do them, they'll just remain a dream.I'll try something else ...