Title: Spiritual Taxonomies and Ritual Authority: Platonists, Priests, and Gnostics in the Third Century C.E., Author: Heidi Marx-Wolf
Title: Early Philosophical Shiism: The Isma'ili Neoplatonism of Abu Ya'qub al-Sijistani, Author: Paul E. Walker
Title: An Introduction to Ancient Philosophy / Edition 1, Author: A. H. Armstrong