Mohanty, J.N. (1992) Reason and Tradition in Indian Thought. An Essay on the Nature of Indian Philosophical Thinking, Oxford: Clarendon Press. (A thoughtful exploration of the principal issues of Indian philosophy.)

Powers, J. (1995) Introduction to Tibetan Buddhism , Ithaca, NY: Snow Lion Publications. (A useful survey of the main schools of Tibetan Buddhism, as well as of the Bon tradition.)

Raju, P.T. (1985) Structural Depths of Indian Thought , Albany, NY: State University of New York Press. (A good survey of the different schools of Indian philosophy from ancient times to the present.)