Retired from teaching now, Indian scholar of philosophy Bhatnagar samples the mystical expressions of Sufi poets during a period when Islam and Hinduism were merging into a single culture in India, elements of the two religions migrating or reflecting across a steadily eroding frontier. After an initial introductory chapter, he looks at individual poets and the experience their work describes. Annotation ©2008 Book News, Inc., Portland, OR (booknews.com)