…they’ve recreated the old, thirteen-sign Babylonian astrological system. If this cannot be turned into fodder for a “secret history” or “modern supernatural esoteric” role-playing game, then nothing can. Particularly if cross-indexed with the mystical beer subplot from The Drawing of the Dark.
(Don’t remember where I saw this first, sorry.)
PS: No, I don’t believe in astrology. However, it’s useful stuff in a RPG.