This is a reproduction, without changes, of a classic text in cryptographic literature. Fletcher Pratt has written an outstanding light-reading book concerning classical cryptography and cryptanalysis. The history of codes and ciphers is covered extensively.
Used availability for Fletcher Pratt's Secret and Urgent
June 1942 : USA Textbook Binding
Title: Secret and Urgent: The Story of Codes and Ciphers
Author(s): Fletcher Pratt
ISBN: 0-89760-721-X / 978-0-89760-721-6 (USA edition)
Publisher: Telegraph Books
April 1996 : USA Paperback