Go was a very popular intellectual sport and there were many excellent teaching materials to choose from. Generally speaking, if you want to improve your Go skills, it is recommended to choose a professional Go textbook such as " An Introduction to Go "," Go Rules and Strategy ", etc. These teaching materials usually explain the rules and strategies of Go in detail to help beginners better understand the basic concepts and rules of Go. If you want to further improve your Go skills, you can choose some more in-depth teaching materials such as "Go Combat Drill","Go Master's Way of Thinking", etc. These textbooks would provide more specific techniques and strategies to help the reader better deal with various situations and opponents. Of course, in addition to the teaching materials, you can also participate in some Go training courses and competitions to continuously improve your level through practice and communication. Go is a sport that requires constant learning and improvement. Through constant practice and exploration, one can definitely become an excellent Go player.