How to achieve self-mastery (The Inner Game of Tennis by Timothy Gallwey)

This book, first published in 1974, focuses on the 'Inner Game' played within the mind of the player, against obstacles such as self-doubt, nervousness, and lapses in concentration. Gallwey introduces the concept of two selves: Self 1, the thinking brain that analyzes and judges, and Self 2, the 'feeling and doing' brain that can master skills naturally if not interfered with by Self 1. The book provides strategies for achieving 'relaxed concentration' and overcoming internal mental and emotional obstacles, making it relevant not only to tennis but also to other areas of life such as music, writing, work, and personal relationships.