A very nice book on the topic, I think that for a novice
to spam-fighting particularly the introduction/overview
of how spammers work, what they exploit and which means
of protection there are (with a good introduction to the
terminology) will prove very useful. The author has
expanded on those for almost a third of the book.

If one is at ease with reading a man-page, or knows ones
way around the basic build-tools the way setup and
installation of the tool(s) (and integration with varied
other utilities) is well-suited for the audience. For
someone without a background in Sys-Administration or
from a Windows-background they may bit a bit brief.

My only beef with the book is that it says it's an
"in-depth guide" which, in the light of the brevity of
many of the chapters, is a bit of an exaggeration.