I know quality when I see it and really enjoy telling my readers about good stuff. 1st U.S. R/C Flight School is selling an educational and much needed Intermediate (Precision) Aerobatics flight-training manual. Professionally written, the graphics are as large as the pages, and the text is easy to read. Based on reading the book and going out and trying the directions, I can tell you that it contains great advice. I recommend that you use the book with a friend. Working in pairs, you could coach each other through a whole series of improvements in your flying.