Top Secret Files

The pigpen cipher, the Devil''s Coffee Mill, and germ warfare were all a part of the Civil War, but you won''t learn that in your history books! Discover the truth about Widow Greenhow''s spy ring, how soldiers stole a locomotive, and the identity of the mysterious “Gray Ghost.” Then learn how to make a cipher wheel and send secret light signals to your friends. It''s all part of the true stories ...