The following is a list of books about PGP. They provide in-depth information about various aspects of PGP, encryption and security.
The Official PGP User's Guide, also translated into German
by Philip R. Zimmermann
MIT Press 1995
ISBN 0-262-74017-6
216 pp. $14.95
PGP: Source Code and Internals
by Philip R. Zimmermann
MIT Press 1995
ISBN 0-262-24039-4
900 pp. $60.00
PGP: Pretty Good Privacy, also translated into German
by Simson Garfinkel
O'Reilly & Associates 1994
ISBN 1-56592-098-8
430 pp. $24.95
Protect Your Privacy: The PGP User's
Guide
by William Stallings
Prentice Hall PTR 1995
ISBN 0-13-185596-4
302 pp. $19.95
Applied Cryptography: Protocols, Algorithms, and Source Code in C
2nd Edition, by Bruce Schneier
Wiley Publishing 1996
ISBN 0-471-11709-9
E-Mail Security with PGP and PEM: How to Keep Your Electronic Mail Private
by Bruce Schneier
Wiley Publishing 1995
ISBN 0-471-05318-X
The Computer Privacy Handbook: A Practical Guide to E-Mail Encryption,
Data Protection, and PGP Privacy Software
by Andre Bacard
Peachpit Press 1995
ISBN 1-56609-171-3
$24.95