When faced with the horrors of the Cthulhu Mythos, investigators need all the help that they can get. This essential player's aid for Call of Cthulhu provides it. The 1920s Investigator's Companion is split into four sections. "The Roaring Twenties" details life in the 1920s, from a general historical overview to listing of favorite songs, books, and films of the era. "On Becoming An Investigator" details the trials of becoming an investigator, offers 140 different occupations, and annotates the use of skills in the 1920s. "The Tools of the Trade" lists resources investigators may use for...