Return to haunted halls and dreadful secrets with Call of Cthulhu: Mansions of Madness Vol. This 224-page hardcover scenario collection includes five 1920s investigations for use with the Call of Cthulhu Starter Set or the 7th Edition Keeper Rulebook. Featuring two fully updated classic scenarios alongside three brand-new adventures, this volume gives Keepers flexible horror stories that can be run as standalones, campaign sidetracks, or linked together into a chilling mini-campaign. Designed for up to six players and their Keeper, each scenario offers one to three sessions of mystery, danger, and sanity-testing revelations. Ideal for groups ready to move beyond beginner collections like Doors to Darkness and Gateways to Terror, Mansions of Madness Vol. 1 delivers deeper investigative horror rooted in the eerie elegance of the 1920s. Key Features 224-page hardcover scenario collection for Call of Cthulhu Five 1920s investigations, including 2 revised classics and 3 new adventures Playable as standalones, campaign sidetracks, or a linked mini-campaign Designed for up to six players and one Keeper Each scenario runs approximately 1–3 sessions Compatible with the Call of Cthulhu Starter Set or 7th Edition Keeper Rulebook Step inside the manor, follow the clues, and pray the walls do not remember you.