The Sworne Booke of Honorius, or the Liber Juratus, is one of the most ancient and influential books concerning Medieval magic and heresy. Written by Pope Honorius, this grimoire has been passed down through Pagan and heretical cultures and has been a reference point for many of the magical incantations, symbols and terse interpretations that have based ancient magical traditions for centuries.
The grimoire was said to have been started before the time of the consecration of Honorius in succession to Boniface V, which was around 625 C.E., and was finished before Honorius' term as Pope ended in October of 638. Several famous copies exist, but perhaps the most famous was the copy that inhabited the study of John Dee, the infamous (yet often misunderstood) Pagan sorcerer. Filled with the speech of incantations for summoning, invisibility and healing, as well as diagrams for pentacles and symbolic medallions to be used during magical practices, the Sworne Book of Honorius was quite heretical, although Honorius denounced the heretical intentions of his work, arousing notions of papal infallability in the Vatican rule. Obviously wanting to avoid the dangers of a backlash from the public, the church condemned Honorius after his papal rule ended, charging him with heresy.
There are not many current duplicates of the Liber Juratus available, and the only major attempt at compiling and publishing the work of Honorius was in 1977, when Daniel Driscoll wrote The Sworne Book of Honorius: the Magician, which was a horrible attempt. Misspelled texts and poor translations removed much validity from the book, and it was neither a commercial nor an historical success.
A copy of some of the text can be found online; however, it is very broken and poorly translated. A decent copy is located at: