I've been working with ASP for some time, and like many of the other reviewers here was very excited to know the internals of ASP, and squeeze more out of it. Unfortunately, Flanders doesn't deliver. It is a large bloated, schizophrenic work that fades in and out of detail. It goes in depth on simple concepts and glosses over the complex, interesting ones. Besides a few undocumented interface calls, I got the impression that Flanders knew just as much as anyone did about the internals of ASP, and without seeing this "mystical" source code he refers to often, have to take his word that he really did do something and did not just smoke and mirror his way around the rest. A reader remarked that this book is at least better than MSDN documentation. While this may be true, it is hardly a redeeming quality for a book with the ambitious and lofty title of "ASP Internals" and from a developmentor.