As the threat of war looms in Europe, the shadow game of espionage has come to America, and Martin Schuller knows it. While most Americans go about their daily lives oblivious to any threat from abroad, Martin's work at the State Department's counter-intelligence office keeps them safe, sometimes going undercover to catch a Nazi spy hidden among them. But an anticipated bust at the rally of the German American Bund in February 1939 results in Martin's mistaken arrest by the FBI, frustrating his efforts to identify the head of a Nazi cell in the United States, code-named Der Skilaufer. Martin is set on a collision course with FBI Special Agent Reginald Sloan, who seems to interfere with Martin's investigation at every turn. Meanwhile, Martin's marriage is falling apart. Can he keep the career he loves without losing his family, or being pushed aside by the FBI? As war looms on the horizon, can Martin identify Der Skilaufer before he compromises a secret American military project?

Book One in the Martin Schuller Spy Catcher series, Hidden Among Us shapes Martin's character and alters the course of his life. Hidden Among Us is part mystery, part spy thriller, which will appeal to fans of David Downing's Station series, or Luke McCallin's Gregor Reinhardt series.