大暗室 (Daianshitsu, The Great Darkroom, 1938) is a thriller by EDOGAWA Rampo (江戸川乱歩). I've not read any of his novels except for a couple of children's adventures, The Fiend with Twenty Faces(1936) and The Boy Detectives' Club (1937). Rampo's writing has quite a range, including children's stories, classical detective stories and "erotic grotesque" stories, which vary in tone from satire to horror.
