I have used the accompanying book as a source for my own research into early Kabbalah and Numerology. This is one of the first books to refer to the Babylonian Kabbalah theories of Professor Parpola. If you have studied ancient Greek culture to A level or University level it is a gem but be prepared for hard study. I would put the card deck in the same league as the Babylonian Tarot by Cicero, a card picture book that gently educates the user in a really important but vanished mindset. This is cultural Tarot in the sense of Angeles Arrien's Tarot Handbook.