A must for support and installations personnel as well as technical savvy users. 1800 pages with a wealth of information on the CD.

After the Resource Kits, the Admin Companions are next most useful books from Microsoft.

boxed set of Sybex's top Windows 2000 books. If you don't already own them, they are a good value and a great reference set.
Mastering Windows 2000 Server, Second Edition
Mastering Windows 2000 Professional
Mastering Windows 2000 Registry
Mastering Active Directory
The box set ships with a CD-ROM containing the text of the four books in keyword-searchable form.