DNS and BIND, Third Edition from O'Reilly and Associates (definitive reference) Platforms: none Price: $32.95 URL: http://www.oreilly.com

The just-released third edition of "DNS and Bind" covers BIND 4.9, on which most commercial products are currently based, and BIND 8, which implements many important new features and will be the basis for the next generation of commercial name servers. Whenever a feature is available only in the 4.8.3, 4.9, or 8.1.2 versions, or if there is a difference in behavior of the versions, the authors carefully notes which version does what. It also covers topics like DNS security (greatly improved with BIND 8.1), asynchronous notification of changes to a zone, dynamic updates, and programming with Perl's Net::DNS module.