The best book I have found on DNS is the O'Reilly book on DNS and BIND. There is also a version that includes Microsoft's DNS implementations.
General advice on books -- read a bit of it in the store. You can safely assume that all of the basic books have the basic information in them, so the big factor should be the author's style. Find a book that you find readable. You will get much more out of a book you can read easily than one that is a chore to read.
What you will use on your LAN depends on what you have/want/need. Here is my take. Tons of books are available on each.
1. You will certainly need DNS of some type. You may want to have your ISP do it for you, and not bother with it yourself.
2. NFS lets you share disks between Linux/unix machines.
3. NIS shares bunches of information, including logins, disks, etc., around your network. For a small network, this may be overkill. For a really big network, it can cut admin time significantly. There are security concerns, however, in that if a hacker gets in, he is really in.
4. Samba lets a Linux/unix box look like an NT server to Win9x and NT boxes. Check with your copy for information on whether it supports Win2K and WinXP clients.
5. Apache is a web server. If you want to put up a web site on Linux, it is a good choice.
Good luck.
