Chaosium have put their H.P. Lovecraft’s Dreamlands book back into print. It seems to be one of those collectable tabletop RPG guides that also serve as a handy encyclopaedia for writers using the setting…

“Includes […] a huge gazetteer [examining the distinct regions of: The East, The North, Oriab, The Seas, The South, The West, The Moon, The Underworld, and Worlds Beyond.], [descriptions of thirty] People of the Dreamlands, lists a number of important non-player characters within the Dreamlands […] over 60 monsters dwelling within the Dreamlands, descriptions of the Dreamlands gods and their cults […] and a fold-out map of the Dreamlands by Andy Hopp.”

256 pages in paper, and now with a PDF version available.