"Don't look at the print date - it is still the best source on IOS security/firewall features that it covers. Take note that it doesn't include new features like Zone-based firewall,Control Plane defenses and other things relevant to new IOSes."
"THE ASA/FWSM handbook, the closest to the source thing you can get with examples/explanations/experience tidbits. Hucaby was one of the beta-testers of ASA/PIX 7.x/8.x firmware. Be aware it does not include VPN topics ."
"The author of the Cisco Router Firewall Security does the great job again. Everything VPN-related, except SSL VPN (it does have chapter on it but rather sketchy). A must for anyone doing VPNs with Cisco gear."
"The rare bird not from Cisco Press but of the highest quality in topics as well as in presenting them. Not strongly related to CCIE but does correlate to the real life tasks."
