I find this book extraordinary in the breadth and depth it covers. It has very good coverage on a wide range of topics in addition to the usual installation and configuration and common sysadmin tasks that is present in most Linux books, and the authors had a lot of insight into the topics (I was skimming through the sections on pgp, ssh, tcp wrappers and firewalls and learned a lot from it).
It is, at the same time, very well written and easy to read and gave me much less headache than reading the howto's, man pages, RFCs, or my Linux Bible! My only criticism is that it is sometimes a bit application-oriented (e.g. it was focussing mainly on swat in the Apache configuration chapter and did not cover manual configuration nor gave explanation of the Apache directives).
In general I find the book well structured and very well written and I definately hope to see the authors continue to update the with the new features of the new versions of Caldera Linux.
