The Keeper's Companion vol. 1 is an invaluable resource for Call of Cthulhu keepers. 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 expansion of the game skills (including nearly two dozen new ones), and the augmented text of the Keeper's Compendium, somewhat updated forbidden books, secret cults, alien races, and mysterious places. Additional short essays and features round out this book.