Fun with Codes and Ciphers Workbook
Dover Publications, July 1987. Stapled Pamphlet. Fascinating, fun-filled book tells how to write and decipher coded messages. Easy-to-follow directions let even young beginners become experts in backward ciphers, false word division, null ciphers and more. Workbook includes ample space for decoding 68 secret messages. Solutions at end of book. Quarto..... More