Applied Cryptography - Bruce Schneier. A comprehensive tutorial and reference but a little light on mathematical theory.
The Code Book - Simon Singh. Traces the development of codes and code-breaking from military espionage in ancient Greece to modern computer ciphers.
Codes and Ciphers - Robert Churchhouse. Describes and analyses systems from the earliest to the most recent.
Contemporary Cryptology - Gustavus J. Simmons. Subtitled "The Science of Information Integrity". Has emphasis on the cryptographic elements of the subject.
Cryptography book recommendations - Cryptography book reviews, links to online erratas, and free book downloads. Most books have charts that recommend prerequisite books, mathematics and programming language experience.
Cryptography for Visual Basic - Richard Bondi. Subtitled "A Programmer's Guide to the Microsoft CryptoAPI" which describes what the book is about.
Cryptography Theory and Practice - Douglas Stinson. Subtitled "Discrete Mathematics and Its Applications". Written with more emphasis on theory than practice, as acknowledged in the preface.
Handbook of Applied Cryptography - The online version of the 1996 CRC book by Menezes, van Oorschot and Vanstone (5th edition) in PostScript and PDF formats.
In Code - Sarah Flannery's supplement to her book "In Code", describing her Cayley-Purser algorithm.
An Introduction to Cryptography - Richard A. Mollin. Intended for a one-semester introductory undergraduate course in cryptography. Covers symmetric and public key systems with chapters on advanced topics.
The Mathematics of Ciphers - S.C. Coutinho. An introduction to number theory and its applications to cryptography. A revised and updated translation from original in Portuguese.
Primality and Cryptography - Evangelos Kranakis. A comprehensive account of recent algorithms developed in computational number theory and primality testing.
Security Engineering - Anderson, Ross. Author describes book in his own words. He explains how "pure" cryptography is not quite so pure when expressed in the context of real world applications.
