"Bat Wing" by Sax Rohmer is a mystery novel likely written during the early 20th century. The story revolves around the enigmatic character Paul Harley, a private detective in London, as he becomes embroiled in a bizarre case involving Colonel Juan Menendez, a mysterious Spanish figure who fears for his life due to dark forces and superstitions tied to Voodoo. Themes of danger, suspense, and the interplay between the exotic and the familiar permeate the narrative. The opening of "Bat Wing" introduces readers to Paul Harley in his London office just as he is about to finish a report for the Home Office. His day is interrupted by the arrival of Colonel Menendez, who expresses his urgent need for Harley's services. As the conversation unfolds, the Colonel reveals his paranoia, detailing a series of ominous events that suggest he is being watched and targeted for harm. The curious atmosphere thickens when he presents Harley with a bat wing, which he claims is linked to supernatural threats originating from his past in Cuba. In this beginning, we're set on a path that hints at supernatural elements woven through a detective story as Harley prepares to confront these unsettling mysteries. (This is an automatically generated summary.)