The renowned occult scholar Arthur Edward Waite left no stone unturned when preparing this meticulously researched volume on the life and works of the French mystic Louis Claude de Saint-Martin. Drawing on contemporary biographies, correspondences, and all the source materials that were available to him at the time, he put together a biography and summary of Saint-Martin's work that is still unsurpassed to this day. This edition is presented with modernised typography and a new and expanded index.