However, one of our recent projects 'required' me setup a Name Server. The admin who was 'supposed' to do it... couldn't!
Anyway, this book really explains in excellent terms not only DNS servers, but the incredible chain of how it all works. By chapter 4, I had Bind installed, two Name Servers up, and 15 virtual hosts configured on a linux box.
I cannot say enough good things about O'Reilly, they cover their bases really well.
Regardless of whether you're new to DNS, or you know it all, this book will expand your knowledge base. Many kudos to the writers on a job well done.