Graham M. Dean 
Agent Nine Solves His First Case [PDF ebook] 
A Story of the Daring Exploits of the G Men

Bob Houston is just embarking on his career as a clerk in the War Department. His uncle, Merritt Hughes, has a much more exciting job as an FBI agent, so Bob is understandably surprised when his uncle comes to him for help getting to the bottom of some suspicious activity. Agent Nine Solves His First Case is a thrilling tale of espionage that’s guaranteed to entertain.