Alvin's Secret Code

by

Alvin's Secret Code - Hicks, Clifford B

When Alvin and Shoie find a secret message, they first try to break the code themselves. Then, they visit Mr. Link, a former spy, who teaches them--and readers--how to be ace decoders. Soon they're using their skill to solve a dangerous mystery. Appendix about codes and ciphers.

Alvin's Secret Code 2006, Bethlehem Books

ISBN-13: 9781932350005

Trade paperback

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Alvin's Secret Code 1998, Puffin Books

ISBN-13: 9780141300559

Mass-market paperback

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Alvin's Secret Code 1963, Henry Holt & Company

ISBN-13: 9780030897368

Hardcover

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