Ghazali on the Principles of Islamic Sprituality: Selections from the Forty Foundations of Religion--Annotated & Explained - Hardcover

Aaron Spevack, PhD, is assistant professor of Islam in the Religious Studies Department at Loyola University, New Orleans. He specializes in Islamic intellectual history, including law, theology and Sufism. He is also a founder and director of Boston's Bukhari Institute, which offers educational programs on the arts and sciences of the Islamic world.

M. Fethullah Gülen is an authoritative and popular Turkish Muslim scholar, imam, preacher and civil society activist. He has extensive knowledge and teaching experience in Islamic scholarship, and is a prolific author with more than sixty books translated into many languages.