Incoming Resources
- The Shakespeare code, Virginia M. Fellows
- The book of codes, understanding the world of hidden messages : an illustrated guide to signs, symbols, ciphers, and secret languages, Paul Lunde, general editor
- Top secret, a handbook of codes, ciphers, and secret writing, Paul B. Janeczko ; illustrated by Jenna LaReau
- The knowhow book of spycraft, Falcon Travis and Judy Hindley; illustrated by Colin King; designed by John Jamieson