books.google.com - The Call of Cthulhu Keeper's Companion is an invaluable resource for gamemasters. New material includes advice for new keepers, a lengthy study of Mythos artifacts, a learned discussion of many occult books, an up-to-the-moment description of every facet of forensic medicine, a thorough revision and...http://books.google.com/books/about/The_Keeper_s_Companion.html?id=659r23-K96sC&utm_source=gb-gplus-shareThe Keeper's Companion
