The Sworn Book of Honorius (in Latin, Liber Iuratus Honorii) is one of the oldest as well as one of the most influential existing medieval grimoires, or works of mediaeval magic. It was prepared from two British Museum Manuscripts. The oldest preserved manuscript, Sloane MS 3854, dates to the 14th century; other Sloane MS 313 dates to the late 14th or early 15th century. This edition is Daniel J. Driscoll’s version of this old and important grimoire. The work was pioneering both in terms of making the text available in English translation, and for the production of a grimoire as a handsomely printed object of virtu.
The grimoire of Honorius is an important witness to the transmission of angel magic, kabbalah (qabbala) and Jewish mysticism to European hermeticists and magicians. This text is supposedly the product of a conference of magicians who decided to condense all their knowledge into one volume. In 93 chapters, it covers a large variety of topics, from how to save one’s soul from purgatory to the catching of thieves or finding of treasures. It has many instructions on how to conjure and command demons, to work other magical operations, and knowledge of what lies in Heaven among other highly sought information.
Like many grimoires, it has lengthy dissertations for proper operation and seals to be used.