Discusses secret writing, ciphers, and the processes of creating and deciphering secret or difficult languages. Includes thinking and writing exercises.
- ISBN10 0613775309
- ISBN13 9780613775304
- Publish Date 17 September 2000 (first published 1 September 2000)
- Publish Status Active
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English