We are not alone. The universe teems with life. We name them Outer Gods, Elder Gods, Great Old Ones, avatars, servitor races, independent races, and they are all either malevolent or uncaring.This monstrous collection is a compendium of creatures, drawn together from fiction spanning over seventy years and from over ten years of Call of Cthulhu scenarios. Learn the secrets of the monsters of the mythos. Parts of this book were originally published as Ye Booke of Monstres I and II. This new volume also contains: several new creatures; the field notes of Sir Hansen Poplan; and four color plates.