Ari Marmell’s cosmic horror / noir mystery Litany Of Dreams (paperback, Kindle) is not the first novel based on a board game. Heck, it’s not even the first based on Fantasy Flight’s H.P. Lovecraft-inspired board game Arkham Horror. But what sets it apart — as Marmell explains in the following email interview — is that unlike most, Litany is actually a prequel that helps set up elements of the Arkham world.