Alvin's secret code

Description:

Twelve-year-old Alvin and his best friend Shoie use their knowledge of codes and ciphers to solve a dangerous mystery.

subjects: Fiction,  Mystery and detective stories,  Buried treasure,  Ciphers,  Detective and mystery stories,  Treasure troves,  Juvenile fiction,  Conduct of life,  Youth,  Code and cipher stories,  Friendship,  Children's fiction,  Buried treasure, fiction