Who is the real author of The Black Insignia? Is it H. R. Sanders, whose name is printed on the cover of every installment of the wildly successful young adult adventure series? Or is it Daniel Roche, the enigmatic world traveler who disappears for months at a time? When Daniel’s great-niece, Hélène, moves to Paris to study archaeology, she does not expect to be searching for answers to these questions. In so doing, she uncovers an explosive secret dating back to the darkest days of the Occupation.