Mary Bowser and the Civil War Spy Ring
The true story of Mary Bowser, a former slave-turned-spy who delivered key intelligence secrets during the Civil War, now in paperback. Readers uncover secrets using codes hidden in the book and spycraft materials included.
Enigma Alberti is the nom de plume of a secret cadre of authors who are each writing a book in the Spy on History series.Tony Cliff is the author and artist behind the New York Times bestselling Delilah Dirk graphic novel series.