[ale] Best DNS sources

[leamhall at gmail.com (Leam Hall)]

I am seeing a need to better understand DNS for IPv4, both Bind 9.8 
implementation and enough theory to explain it to others. As usual, 
there's not enough time for "the ideal path". I need to grok DNSSEC, 
geographic disperal, and how to test.

Don't mind buying a book or two, but the O'Reilly is from 2006 and way 
outdated. Any recommendations?

Thanks!

Leam