• 3 MERIT Library
• 1 Cooperative Children's Book Center (CCBC)

• 13 Books

• 6 History
• 3 Families
• 3 Secret service
• 1 Brothers
• 1 Casualties
• 1 Code and cipher stories
• 1 Conscientious objectors
• 1 Cryptographers
• 1 Cryptography
• 1 Death
• 1 Dogs
• 1 English fiction
• 1 Espionage, German
• 1 Family life
• 1 Female friendship
• 1 Fire fighters
• 1 Friendship
• 1 Germans
• 1 Government Code and Cypher School (Great Britain)
• 1 Hitler, Adolf, 1889-1945
• 1 Holocaust, Jewish (1939-1945)
• 1 Intelligence officers
• 1 Invasions
• 1 Islands

• 2 Howard, Elizabeth Jane
• 1 Bowen, Rhys
• 1 Cooper, Duff, Viscount Norwich, 1890-1954
• 1 Deacon, Alexis
• 1 Digitalia (Firm)
• 1 Follett, Ken
• 1 Iles, Greg
• 1 McKay, Hilary
• 1 Montagu, Ewen, 1901-1985
• 1 Montolió, Célia
• 1 Morpurgo, Michael
• 1 Peters, Ellis, 1913-1995
• 1 Quinn, Joanna, 1976-
• 1 Quinn, Kate
• 1 Sedgwick, Julian
• 1 Sedgwick, Marcus
• 1 Thayer, James Stewart

• 12 English
• 1 Spanish

• 4 England
• 2 Germany
• 2 Grande-Bretagne
• 1 Allemagne
• 1 Angleterre
• 1 Bletchley Park
• 1 Bletchley Park (Milton Keynes, England)
• 1 France
• 1 London
• 1 London (England)
• 1 Londres (Angleterre)
• 1 Milton Keynes
• 1 Scotland
• 1 Sussex (England)

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