TY  - BOOK
AU  - Poskitt,Kjartan
AU  - Baker,Ian
TI  - The secret life of codes
T2  - Murderous maths
SN  - 9781407107158 (pbk.) :
U1  - 652 
PY  - 2010///
CY  - London
PB  - Scholastic
KW  - Ciphers
KW  - Juvenile literature
KW  - Cryptography
KW  - fast
ER  -