Enigma girls : how ten teenagers broke ciphers, kept secrets, and helped win World War II by Fleming, Candace 

BTSB Prebound(Scholastic Focus, 2024)

BTSB #: 341117 Available

Dewey: 940.54/NAges: 8-12   
Lexile: 870

Genres:

Subjects: Government Code and Cypher School (Great Britain) Great Britain.|bRoyal Navy.|bWomen's Royal Naval Service (1939-1993) World War, 1939-1945 - Cryptography Enigma cipher system World War, 1939-1945 - Military intelligence - Great Britain Bletchley Park (Milton Keynes, England) - History

Summary: Bletchley Park was a well-kept secret during World War II, operating under the code name Station X. The critical work of code-cracking Nazi missives that went on behind its closed doors could determine a victory or loss against Hitler's army. Amidst the brilliant cryptographers, flamboyant debutantes, and absent-minded professors working there, it was teenaged girls who kept Station X running. Some could do advanced math, while others spoke a second language.

Unbreakable : the spies who cracked the Nazis' secret code by Barone, Rebecca E. F. 

BTSB Prebound(Holt, 2022)

BTSB #: 091734 Available

Dewey: 940.54/NAges: 10-14   
AR: 7.7 MG Lexile: 1000

Genres:

Subjects: World War, 1939-1945 - Cryptography Enigma cipher system Cryptographers - Poland Cryptographers - France Cryptographers - Great Britain World War, 1939-1945 - Secret service

Summary: Tells the story of one of the most dangerous war-time code-breaking efforts ever. As Hitler marched his troops across conquered lands and deadly "wolfpacks" of German U-Boats prowled the open seas, victory-or defeat-for the Allies hinged on their desperate attempts to crack the code. When a group of Allied spies and codebreakers cracked the Nazis's infamous cypher, it allowed them to read secret military messages and turn the tide of World War II.