"Those who delight in puzzles can find much to ponder here." -- Science News Letter
"Will be well received by anyone really interested in the subject." -- Scientific Book Club Review
Readers interested in secret writing will find this book an excellent elementary explanation of transposition and substitution ciphers, codes, and their solutions. More than 150 problems provide practical application as well as tests of skill and ingenuity.
After a brief description of the history of secret writing, the reader is introduced to fundamental principles of ciphers -- transposition and substitution -- and given an understanding of the various methods of enciphering and deciphering secret messages. The author covers geometrical patterns, route transcription, columnar transposition, and other methods used in transposition; under substitution, he treats mixed cipher systems, single-alphabet and polyalphabetical substitution, mechanical devices, the Vigen�re system, etc. A discussion of cryptanalysis leads the reader into 151 problems for which answers are provided at the end. Appendixes offer notes on enciphering Japanese; and explanation of the Baconian Biliteral Cipher; frequency tables for English, French, German, Italian, and Spanish.

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Always Superior Books
GA, U.S.A.

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Books are returnable for any reason within seven days. We accept checks,money orders and all major credit cards. Postage via priority mail is $8.50 for the first book and $1.50 for each additional book. Media mail shipping is $3.50 uninsured for the first book and $1.50 for each additional book. Please note that it is strongly recommended that the customer insure all purchases as I cannot be responsible for books lost in the mail.

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Orders usually ship within 2 business days. Shipping costs are based on books weighing 2.2 LB, or 1 KG. If your book order is heavy or over sized, we may contact you to let you know extra shipping is required. Always Superior Books,Contact name: Barney Barnhart, email: asbarnhart@bellsouth.net, Address: 3940 Clubland Drive, Marietta,Ga.30068. Phone 770-977-8040.

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