Liber Artis Archaeomancy: Mastering the Angels of the Four Worlds by Frater Barrabbas

Frater Barrabbas presents a system of angelic invocation organized around the four Qabalistic Worlds and ten Sephiroth. Archaeomancy, as he describes it, extends beyond calling upon an angel to imagining ritual entry into the spiritual realms associated with that being.

The book develops a structured magical architecture of forty realms and discusses several classes of angels. Written for intermediate and advanced ritual practitioners, it presents the author's ceremonial method and metaphysical understanding, not an independently verified account of contact with spiritual entities.