The Princeton Encyclopedia of Islamic Political Thought
Patricia Crone & Gerhard Bowering & Mahan Mirza & Wadad Kadi & Muhammad Qasim Zaman & Devin J. Stewart
One Taste: Daily Reflections on Integral Spirituality
Kenneth E. Wilber
Before European Hegemony: The World System A.D. 1250-1350
Janet L. Abu-Lughod
Constantine Porphyrogenitus and His World
Arnold Toynbee
Popper's Philosophy of Science - Overview
Ralph E. Kenyon Jr.
Encounters With Great Psychologists: Twelve Dramatic Portraits
John H. Kunkel