Title: Codes, Ciphers and Secret Writing (Test Your Code Breaking Skills)
Author: Martin Gardner

New book: ships from United Kingdom via airmail with tracking, delivered by USPS, usual timescale around 2 weeks.

Publication Date: Oct-01-1984.
Binding: Paperback.
Pages: 96.
Edition: unknown.
Dimensions (LxWxH): 0.25 x 5.50 x 8.50 (inches).