20 Must-Read Supernatural Mysteries surveys the fertile borderland where detective logic encounters haunting, prophecy, occult knowledge, and the inexplicable. Its selections range from Gothic terror and fin-de-siècle decadence to adventure tale, psychological suspense, ghost story, and proto-weird fiction, demonstrating how mystery conventions can both contain and intensify supernatural disturbance. Standout encounters with cursed objects, spectral visitations, hidden identities, and uncanny landscapes reveal the genre's enduring ability to turn uncertainty into narrative pleasure. The contributors constitute a remarkably broad Anglo-American and Caribbean literary cohort, including major shapers of detective fiction, Gothic revivalism, imperial adventure, popular sensationalism, and cosmic horror. Their differing professional worlds-journalism, popular magazine culture, theatrical and serial fiction, colonial writing, and literary experimentation-bring distinct social anxieties to the supernatural: fears concerning inheritance, crime, empire, gender, science, and the limits of rational explanation. Together, these voices illuminate the transition from Victorian sensation and Gothic romance to twentieth-century weird and speculative fiction. Recommended for students, genre historians, and general readers alike, this volume offers an unusually compact education in supernatural mystery's many registers. Reading across its diverse styles encourages comparison between competing forms of evidence, dread, and revelation, while revealing an ongoing dialogue between skepticism and belief. It is an inviting gateway to a tradition whose mysteries remain unsettling precisely because they resist final solution.