In this major new interpretation of the thought of the heretical philosopher Giordano Bruno (1548-1600), Karen de Leon-Jones depicts the influential thinker as mystic and Kabbalistic. She rejects the popular view of Bruno as Hermetic magus - a position initiated by Frances Yates and widely accepted by succeeding scholars.

Bruno's interest in mysticism and the Kabbalah was not merely intellectual or satiric, de Leon-Jones contends: a close look at his study of the Kabbalah reveals him as a practicing believer.

This book sets Bruno's thought in the context of the widespread interest in non-Christian religions in fifteenth- and sixteenth century Italy. His quest for an alternative model to the strict spirituality of post-Reformation churches, for a way to encompass both scientific and mystical views of the universe, led Bruno to the Kabbalah. De Leon-Jones argues that Bruno's dialogue Cabala del cavallo (Kabbalah of the pegasean horse) expressed his mystical, kabbalistic doctrine.

For Bruno, the Kabbalah reconciled science with theology and provided a biblical support for theories such as metempsychosis that he wished to prove scientifically through atomic theory and physiognomy.

Balancing his mystical Cabala dialogue with the Hermetic vein of his dialogue Spaccio della bestia trionfante and the Napoleonic emblems of De'li eroici furori, Bruno creates a solid syncretic trilogy, as well as a strikingly modern apology for scientific and philosophical debates still of interest today.