ORIGINAL: sheograth
Seems like a waste of money, all that information is available for free here on RCU and all over the internet. It doesn't take a degree in mechanical engineering to tune a nitro engine, if you're having trouble just ask.
I agree, just read the free stuff. This site and a few others are a wealth of information and it doesn't cost $40. If you watch the forums awhile you'll learn who actually knows and understands how these things work and know who to pay attention to when they answer your questions. If you just feel like you have to have a book then I know that Tower sells several hard copies that don't cost $40.