The Enemy Within

Department Z faces its biggest test when the organization is threatened by an enemy on the inside—from the author who sold eighty million books worldwide.

Charles Corliss, son of a murdered agent from Department Z, seems like the perfect recruit for the ultra-secret spy organization. But when things start going seriously wrong, the agents begin to suspect this charming young man is not as loyal as he first seemed. Filled with hate for the organization that allowed the death of his father, Charles begins to sabotage the department as a double agent dedicated to the Communist cause.

Title: The Enemy Within
Published: 1950
Genre: Department Z