"Occult Encyclopedia of Magic Squares: Planetary Angels and Spirits of Ceremonial Magic" by Nineveh Shadrach is a 2009 grimoire, published by Ishtar Publishing, that expands on traditional planetary squares with over 100 unique, elemental variants. The text focuses on esoteric techniques for extracting angels and spirits for ceremonial magic, using a specific mathematical code for talismanic work. For more details, visit Biblio .