Dictionary of Sufism

John Renard has written several good works on Islam and Sufism, this should make for good and instructive reading.

clipped from astore.amazon.com Click here With more than 3,000 entries and cross-references on the history, main figures, institutions, theory, and literary works associated with Islam’s mystical tradition, Sufism, this dictionary brings together in one volume extensive historical information that helps put contemporary events into a historical context. Historical Dictionary of Sufism (Historical Dictionaries of Religions, Philosophies and Movements) By John Renard