Title: Citrix XenDesktop Implementation: A Practical Guide for IT Professionals, Author: Gareth R. James
Title: RADIUS: Securing Public Access to Private Resources, Author: Jonathan Hassell
Title: OpenVPN: Building and Integrating Virtual Private Networks, Author: Markus Feilner
Title: SSL VPN : Understanding, evaluating and planning secure, web-based remote access, Author: Joseph Steinberg