Question: What book are the old ones, that exist on different planes of existence simultaneously apart of?
Sentence (from "Old Ones (Palladium Books)"): The Old Ones (sometimes referred to in Palladium Books publications as the Great Old Ones or the Unnameable Beings) are a fictional race of Alien Intelligences within the megaversal setting of Palladium Books' game module PFRPG.
Relevant evidence: Yes