From the opening and throughout this book, it seems obvious that this is a hasty retread of a previous ASP.NET 2.0 edition. Most tellingly, there are numerous explanations of the way that ASP.NET 2.0 improved on such-and-such a feature of ASP.NET 1.0 or 1.1, which seem of little relevance to those looking to upgrade themselves to the latest ASP.NET. Other material and examples also seem written for an earlier time.
The meat for upgrading programmers is not only somewhat obscured in the clutter of old stuff, but is very thinly sliced when found. For example, one of my principle objectives in buying the book was to understand LINQ better, but the chapter on LINQ offers little more than a summary of the LINQ notes freely available on Microsoft's web site.
On the plus side, as owner of other books by Dino Esposito I notice that his writing gets better with every book, and he is now among the most adept of authors at clearly explaining many topics. For someone new to ASP.NET, this book can be considered seriously, but a better book exists (see my reviews).