Marsh's greatest commercial success came with one of his earliest novels, The Beetle (1897). A story about a mysterious oriental figure who pursues a British politician to London, where he wreaks havoc with his powers of hypnosis and shape-shifting, Marsh's novel is of a piece with other sensational turn of the 19th to 20th century fictions such as Stoker's Dracula, George du Maurier's Trilby, and Sax Rohmer's Fu Manchu novels. Like Dracula and many of the sensation novels pioneered by Wilkie Collins and others in the 1860s, The Beetle is narrated from the perspectives of multiple characters, a technique used in many late 19th-century novels (those of Wilkie Collins and Stoker, for example) to create suspense and to confuse gender boundaries.