Volume I: Foundations of Mysticism:
Origins to the Fifth Century
Crossroad Publishing Company, 1994
493 pages
ISBN 0-8245-1404-1

Volume II: Growth of Mysticism:
Gregory the Great through the 12th Century
Crossroad Publishing Company
630 pages
ISBN 0-8245-1628-1

Volume III: Flowering of Mysticism:
Men and Women in the New Mysticism (1200-1350)
Crossroad Publishing Company
526 pages
ISBN 0-8245-1742-3

Volume IV: Continuity and Change in Western Mysticism
Crossroad Publishing Company
(not yet published)

Volume V: The Crisis of Mysticism
Crossroad Publishing Company
(not yet published)