"Science of Breath" is a book written by William Walker Atkinson, first published in 1903. Atkinson was a prolific writer on the subjects of New Thought, metaphysics, and yoga philosophy. The book explores the science behind the breath and its profound impact on physical, mental, and spiritual well-being.

The main focus of "Science of Breath" is to elucidate the importance of conscious and controlled breathing for overall health and vitality. Atkinson delves into the physiological aspects of respiration, explaining how breath affects the body's various systems and functions. He emphasizes the role of breath in maintaining balance and harmony within the body.

The book also delves into the connection between the breath and the mind, discussing how different breathing techniques can influence one's mental state and emotional well-being. Atkinson introduces various yogic breathing exercises and practices, providing instructions on how readers can incorporate these techniques into their daily lives to enhance physical health, mental clarity, and spiritual awareness.

"Science of Breath" is not just a practical guide to breathing exercises; it also explores the spiritual dimensions of breath and its significance in various mystical traditions. Atkinson discusses the concept of "prana," the vital life force, and how conscious breathing can help individuals tap into this universal energy for spiritual growth and enlightenment.

Overall, the book is a comprehensive exploration of the science and art of breathing, providing readers with practical insights and exercises to improve their physical, mental, and spiritual well-being. While some of the scientific understanding presented in the book may be considered outdated by modern standards, "Science of Breath" remains a classic in the field of holistic health and breathwork.