Liber Spirituum is a high-quality photographic reproduction of Paul Huson's personal grimoire.

Huson began the work of constructing his personal Liber Spirituum or Book of Spirits. Drawing on this wellspring of knowledge and such venerable works as the Key of Solomon, The Magus, Heptameron, Three Books of Occult Philosophy as well as others set down a unique and informed set of rituals, in addition to employing his own artistry in the creation of distinctive imagery.