The Mystery of the Sea by Bram Stoker

Malcolm Ross, a British gentleman, becomes embroiled in a complex mystery involving an ancient cryptogram, Spanish treasure, and a young American woman with second sight. Set in Scotland, the novel weaves together romance, spiritualism, espionage, and prophecy. As visions and puzzles guide them toward a hidden secret, Malcolm must confront both external threats and inner doubts. The story unfolds slowly, rich with atmosphere and mystical intrigue. It’s one of Stoker’s most layered and ambitious non-Dracula works.