Fortress of Terror gathers more than 550 horror classics, supernatural mysteries, and macabre tales into a capacious survey of fear's literary forms. Gothic castles, haunted houses, revenants, occult experiments, psychological disturbances, colonial encounters, and grotesque comic reversals appear alongside detective-inflected mysteries and tales of cosmic dread. The volume moves fluently from Romantic sensation and Victorian ghost story to fin-de-siècle decadence, American weird fiction, and early modern horror, making its most striking achievement the breadth with which it stages terror as both entertainment and cultural diagnosis. Its contributors constitute an extraordinary transnational archive: canonical novelists, popular serial writers, antiquarians of folklore, experimenters in speculative fiction, and major architects of the weird tale. British, American, French, German, Russian, Irish, and other traditions converge here, illuminating the Gothic's evolution through Romanticism, realism, spiritualism, imperial anxiety, the New Woman, decadence, and modernity's scientific uncertainties. Across these divergent social and literary contexts, recurring figures—the double, the vampire, the cursed object, the threatened domestic space—acquire fresh ideological and emotional force. This anthology is especially recommended for readers seeking both immersion and scholarly range. It offers an unusually rich opportunity to compare styles, national traditions, and changing conceptions of monstrosity within one volume. Students, researchers, and devoted readers of the uncanny will find an invaluable map of horror's enduring conversations.