The Four Hatha Yogas And Practical Concentration And Meditation is a book written by Ernest Wood. The book explores the four types of Hatha Yoga and how they can be used to achieve physical, mental, and spiritual well-being. The four types of Hatha Yoga are Karma Yoga, Bhakti Yoga, Jnana Yoga, and Raja Yoga. Each type of yoga focuses on a different aspect of the self and has different techniques and practices.The book also delves into practical concentration...