Nihon Ki does an excellent job of explaining the different strategies and differences between nine stone handicaps and three stone handicaps. The author makes no pretense of having all the answers to winning handicapped Go, but does explain common patterns and shapes that come up and how certain moves are strong or weak in relation to the handicapped stones. He also does a good job of explaining the principles that need to be mastered in order to lower the handicaps as you improve. The only thing is, I didn't get much out of his explanations of three stone handicapped games, perhaps because they are too similar to even games. However, I was happy with what I have learned and Nihon Ki-in has helped me improve by two stones, which makes this book worthy of reading.