|New to Call of Cthulhu? A battle-scarred veteran of many campaigns? Here are essential background articles useful to most keepers.
- "The History Behind Prohibition" - A lengthy article bringing anti-alcohol advocates, law enforcement, gangsters, rum-runners, and consumers into focus. Lots of good stories.
- "The Keeper's Master List of Call of Cthulhu Scenarios" - Lists are alphabetical by the following topics: scenario era; creature / maniacs / great old ones; legendary heroes and villains; cults / sects / secret societies; Mythos tomes; fictitious locations; and Mythos books from publishers other than Chaosium.
- "Iron: a Survey of Civilian Small Arms Used in the 1890's, 1920's, and the Present". Practicalities of firearms; common malfunctions; new skills Handloading and Gunsmithing. Firearms considered are likely to be encountered or thought specially useful by investigators. Insightful discussions of nine specific rifles, five shotguns, ten handguns, a sniper rifle, and the Thompson submachine gun. Hot load damage values for most weapons, along with comparative ratings for noise, maintenance, powder, reloading per round, more, plus standard stats.
- "Medical Examiner's Report" discusses the unusual corpse recovered by the Essex County Sheriff's Department, as does "Dr. Lippincot's Diary" from another point of view. Also a short article on deep one / human reproduction.
- Brian Sammon's "Mythos Collector" submits write-ups for the Book of Iod, Chronike von Nath, Confessions of the Mad Monk Clinthanus, Letters of Nestar, The Nyhargo Codex, Soul of Chaos, Testament of Carnamago, The Tunneler Below, Visions From Yaddith, Von denen Verdammten, as well as for more than a dozen new spells.
- "Mythos ex Machina" gathers about forty examples of alien technology from Cthulhu supplements. Gordon Olmstead-Dean outlines the odd connections between H. P. Lovecraft and the Satanists HPL never knew, in "LaVey, Satanism, and the Big Squid".