Decent books on ASAs

AvgITGeek

Hello all!
If this isn't the right place to ask this question, please remove my post. My job duties have shifted a little more to the Cisco side recently so I started picking up the CCNA books again. One of our clients suffered an ASA failure where it was configured in an Active/Standby configuration as the Primary. Cisco TAC somewhat walked me through the process of replacing the failed primary as they gave me some of the commands but I figured out a bunch on my own. Watching those two 5506s get reintroduced and failover without a dropped ping is a thing of beauty and I've been thinking about it since. SO..

I've seen some books on Amazon about Security and ASAs. Do any of you have a favorite or go to book when dealing with ASAs?

Thanks in advance!

shortstop20

Cisco ASA: All-in-one Next-Generation Firewall, IPS, and VPN Services, 3rd Edition