I : Access to Western Esotericism, Albany, State University of New York Press, 1994, vol. II: Theosophy, Imagination, Tradition, Studies in Western Esotericism, Albany, State University of New York Press, 2000
I : Access to Western Mysticism, Albany, State University of New York Press, 1994, vol. II: Theosophy, Imagination, Tradition, Studies in Western Mysticism, Albany, State University of New York Press, 2000