Reading this book had a curiously integrative effect on my Apache knowledge. Maybe I had already encountered the major pieces reading the other two books that I mentioned. However, I think it is due to the book's size and organization. The smaller size means that related topics are closer together. Configuration directives are grouped by module and presented in the order you typically encounter them.
References point back and forth between the module and the directive descriptions.
I liked this book. By the time I finished it, there were a bunch of paper clips marking features I wanted to try out as soon as I got back to my computer.