Monographs • -----
New Age Religion and Western Culture: Esotericism in the Mirror of Secular Thought, Brill, Leiden 1996,
State University of New York Press, Albany 1998. ; . • ----- and R.M. Bouthoorn
Lodovico Lazzarelli (1447–1500): The Hermetic Writings and Related Documents, Arizona Center for Medieval and Renaissance Studies, Tempe, 2005. • -----
Swedenborg, Oetinger, Kant: Three Perspectives on the Secrets of Heaven, The Swedenborg Foundation, West Chester, Pennsylvania 2007 (Swedenborg Studies Series, no. 18) . • -----
Esotericism and the Academy: Rejected Knowledge in Western Culture,
Cambridge University Press, Cambridge 2012, . • -----
Western Esotericism: A Guide for the Perplexed,
Bloomsbury, London 2013. • -----
Hermetic Spirituality and the Historical Imagination: Altered states of knowledge in late antiquity,
Cambridge University Press, 2022. . • -----
Esotericism in Western Culture: Counter-Normativity and Rejected Knowledge,
Bloomsbury, London 2025. .
Edited volumes • (ed., with Peter J. Forshaw & Marco Pasi),
Hermes Explains: Thirty Questions about Western Esotericism. Amsterdam University Press 2019, . • (ed., with Ria Kloppenborg),
Female Stereotypes in Religious Traditions.
Brill, Leiden 1995, . • (ed., with Roelof van den Broek),
Gnosis and Hermeticism from Antiquity to Modern Times. State University of New York Press, Albany 1998. • (ed., with
Antoine Faivre),
Western Esotericism and the Science of Religion, Peeters, Louvain 1998. • (ed., with Richard Caron, Joscelyn Godwin &
Jean-Louis Vieillard-Baron),
Ésotérisme, gnoses & imaginaire symbolique: Mélanges offerts à Antoine Faivre, Peeters, Louvain 2001. • (ed. in collaboration with Antoine Faivre, Roelof van den Broek, Jean-Pierre Brach,
Dictionary of Gnosis and Western Esotericism, Brill, Leiden 2005. . • (ed. with
Jeffrey J. Kripal),
Hidden Intercourse: Eros and Sexuality in the History of Western Esotericism. Brill, Leiden 2008. • (ed. with Joyce Pijnenburg), ''Hermes in the Academy: Ten Years' Study of Western Esotericism at the University of Amsterdam''.
Amsterdam University Press, 2009. ==See also==