The Stolen War-Secret is a compact example of Arthur B. Reeve's wartime scientific detective fiction, uniting espionage, national anxiety, and laboratory reasoning in a brisk popular narrative. Centered on the theft of a vital military secret, the story moves through a world of coded motives, suspicious agents, and modern technological peril. Its style is direct, suspenseful, and explanatory: clues are not merely discovered but interpreted through contemporary science, placing the tale within the early twentieth-century tradition of rational detection shaped by Sherlock Holmes yet distinctly American in its fascination with invention and public security. Arthur B. Reeve, best known as the creator of Craig Kennedy, the "scientific detective," was deeply attuned to the cultural authority of science in the Progressive Era. Trained as a journalist and active during a period marked by rapid technological change and the First World War, Reeve transformed public concerns about chemistry, electricity, surveillance, and espionage into accessible fiction. Readers interested in classic detective stories, early spy fiction, or the literary history of technology will find The Stolen War-Secret especially rewarding: a swift, intelligent narrative that reveals how modern warfare reshaped the detective imagination.