Code breaker, spy hunter : how Elizabeth Friedman changed the course of two world wars by Wallmark, Laurie 

BTSB Prebound(Abrams Books for Young Readers, 2021)

BTSB #: 917452 Available

Dewey: 652/BAges: 6-9   
AR: 6.3 MG F&P: U

Genres:

Subjects: Friedman, Elizebeth,|d1892-1980 United States.|bCentral Intelligence Agency Ciphers Cryptography Intelligence officers

Summary: A picture book biography of Elizabeth Friedman, a brilliant American code breaker who smashed Nazi spy rings, took down gangsters, and created the CIA's first cryptology unit.

Code makers & code breakers [Beyond The Battlefield]by Wells, Allen R. 

BTSB Prebound(Rourke Educational Media, 2021)

BTSB #: 933254 Available

Dewey: 355/NAges: 9-12   
Lexile: 970

Genres:

Subjects: Ciphers Cryptography Military art and science

Summary: Uncovers the amazing tales of courageous and innovative people and groups who created--and cracked--seemingly unbreakable codes during times of war.