Features
- Reading level: Baby-Preschool
- Cover Type: Paperback with 64 pages
- Published by: Random House Children's Books March 1983
- Written in: English
- ISBN 10 Number: 0394852311
- ISBN 13 Number: 978-0394852317
Product Description
Explains how to make codes, gives some established codes, and provides stories and exercises to practice deciphering.