Published by Eschaton, in 1996, this has become one of the most sought-after, and important works on the Goetia, evocation, and most importantly, on the Qliphoth. This is a very significant reference work, which includes numerous charts, tables, diagrams, sigils and seals, dealing with the Qliphoth, and the demons of the Goetia. There are also practical instructions, rituals and experiments. This is a Workbook for real magicians.
Interesting text in that not only does it have relatively unique take on Goetia, but has fascinating experimental records of same. Includes a translation of the primary source text 'The Testament of Solomon' as an appendix.