"
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 from the Top Secret Files: The Civil War. Take a look if you dare, but be careful! Some secrets are meant to stay hidden . . .
Ages 9-12
"- Publisher : Prufrock Press
- Publication Date : September 01, 2014
- Language : English
- Binding : Trade Paper
- Dimensions : 8 x 0.3 x 5 inches
- Pages : 119
- ISBN-13 : 9781618212504
- Weight : 0.53 lb