Books

Beginning OpenVPN 2.0.9
by Markus Feilner and Norbert Graf
Publisher: Packt Publishing (December 2, 2009)
ISBN: 184719706X
[Amazon.com Reviews]

OpenVPN 2 Cookbook
by Jan Just Keijser
Publisher: Packt Publishing (March, 2011)
ISBN: 1849510105

OpenVPN: Virtual Private Network, Pre-Shared Key, Certificate Authority, NetBSD, FreeBSD, OpenBSD, Linux, Solaris (Operating System), Transport Layer Security
by Lambert M. Surhone, Miriam T. Timpledon and Susan F. Marseken
Publisher: Betascript Publishing (February 4, 2010)
ISBN: 6130362560

OpenVPN: Building and Integrating Virtual Private Networks
by Markus Feilner
Publisher: Packt Publishing (May 11, 2006)
ISBN 190481185X