A huge GUMSHOE source book for The Esoterrorists and Fear Itself The Book of Unremitting Horror ... presents a coherent and darkly surreal mythos the equal of Cthulhu or the world of Kult with a full background, albeit jumbled up, based around cults, The Outer Dark, the sinister and incomprehensible Ocean Game and the strange and dark creatures that this otherworld spawns. While it can be used to provide things for the other games I feel that Unremitting Horror is more than just a resource book for antagonists and is worthy of its own devoted campaign of either of the other games.