"…densely thought and richly engaged with an unusually wide range of scholarly material … an ambitious, rich, and important book." — The Journal of Religion"This volume is an auspicious beginning to one of the most ambitious projects in contemporary scholarship. It is nothing less than mapping the Gnostic and, of necessity, esoteric genealogy of the intellectual giants of the modern world. Many have given us portions of this grand narrative; O'Regan promises to provide us with as complete an account as scholarship currently makes possible." — David Walsh, author of Guarded by Mystery: Meaning in a Postmodern Age"Gnostic Return in Modernity offers a strong, provocative thesis, set forth at a high level of intellectual brilliance." — Peter C. Hodgson, Vanderbilt Universi"An extraordinarily important work that should have an enormous impact." — Thomas J. J. Altizer, author of Genesis and Apocalypse: A Theological Voyage Toward Authentic Christianity