Alvin's secret code.
By: Illustrated by Bill Sokol.
Contributors: Sokol, Bill, illus.
Edition: [1st ed.]
Publisher: Holt, Rinehart and Winston
Published: 1963
Place of publication: New York
Language: eng
Number of pages: 159
Subjects: Ciphers -- Fiction.; Buried treasure -- Fiction.; Mystery and detective stories.
Description: Twelve-year-old Alvin and his best friend Shoie use their knowledge of codes and ciphers to solve a dangerous mystery.