What a great reference for DBAs who need to support SQL Server. This is one book that was actually fairly easy to read from cover to cover (given the subject matter), but could also be quite easily used as a reference manual.
Like all reference books, I was quite pleased to find a really well put together set of appendices. In this final section, the authors discuss system tables (including purpose and schema) as well as undocumented DBCC commands. Perhaps even more useful is a final section on the built-in extended stored procedures available in SQL Server 2000.