"Elusive Isabel" is a novel written by Jacques Futrelle, an American author known for his detective fiction, particularly for creating the character Professor Augustus S.F.X. Van Dusen, also known as "The Thinking Machine." However, "Elusive Isabel" is not a detective story but rather a romantic thriller."Elusive Isabel" is a tale involving espionage, mystery, and romance. The plot revolves around a young American heiress named Isabel, who becomes entangled in a web of international intrigue and espionage. She inadvertently finds herself caught between spies and secret agents while navigating through a thrilling series of events.Futrelle, primarily recognized for his detective stories, showcased his versatility as a writer with "Elusive Isabel." This novel highlights his storytelling skills by incorporating suspense, espionage, and a romantic plot, offering readers an engaging narrative that differs from his usual detective-themed works.