Step into the shadowy world of haunted estates, arcane secrets, and vanishing magicians with Mansions of Madness Vol. 1: Behind Closed Doors. This terrifying collection includes five scenarios for Call of Cthulhu 7th Edition, perfect for standalone sessions or a 1920s mini-campaign. Featuring revised classics and new nightmares, this book is your key to unraveling the madness behind closed doors.