Agent Nine Solves His First Case Graham M. Dean

Bob Houston is a young clerk in the War Department. His uncle is a Department of Justice Agent. When some important radio secrets disappear, Bob helps his uncle revocer them. He proves himself so able that he is appointed an Agent and his adventures begin in earnest -- reaching a climax when he finds himself involves in the solution of a jewel smuggling mystery.

Graham M. Dean wrote adventure tales, including the "Agent Nine" books and the Howard Kent series about a West Point Cadet.