""Five Varieties of Yoga and the Union of Eastern and Western Philosophy"" is a book written by W. J. Colville that explores the different types of yoga and their relationship to Eastern and Western philosophy. The author provides a detailed analysis of five different varieties of yoga, including Hatha, Raja, Karma, Jnana, and Bhakti, and examines how they can be used to achieve spiritual growth and enlightenment. Colville also explores the ways in...