I cannot recall the last time I was left feeling that a book purchase was a complete waste of money. Firstly, let me say that I took an almost immediate dislike to the book, relegating it to the back of a cupboard after several chapters. I have two basic problems based on what I did read: the book is dated in its content and is dated in its style. Technically, a lot of the information provided seems obsolete in the face of the excellent Apache 2.x online documentation. Despite the bold declaration on the exterior that this edition now covers version 2.0 you'll still find a lot of old 1.3 examples within. The sections relating to topics such as server side logic and Tomcat connectivity are simply a joke and cannot have been updated since the second edition (circa last century).
The book is largely composed of content taken directly from the official Apache documentation. When the authors do provide original material it is often highly parochial and has a horrible tendency to veer off course. There is an obsession with FreeBSD that is virtually monomaniacal and rarely is the opportunity missed to take issue with win32 or display disdain for the popularity of Linux. The two authors conjure images of hoary old academics who never quite manage to put aside their technological bigotry and I simply cannot accept this tone in a technical book.
In its present form this title only serves to tarnish both the good name of O'Reilly and any confidence in Apache as a commercial solution. Unless you are running a seriously old version of the server you would be better advised to spend a little time searching the Web for practical answers to your problems. For more general information, the official Apache documentation is of course free, accurate and up-to-date.