Well, you wouldn't expect less from Mr. Ritcher, would you?
First things first. This is not a book for the novice. While some of the initial chapters explain basic details of .NET and the CLR (being experienced, you can safely peruse past them quickly), most of the chapters explore the different topics in a clear, concise and, at the same time, deep enough way. The chapter on CLR Hosting is a good example of this. This chapter, as a representative sample of the rest of the book, delivers some deep geek CLR knowledge that most average developers are not aware of at all, with a highly praisable clearness and quality.
Mr. Ritcher manages to make you understand the topics, provides useful examples and, to sum it up, thus makes of his book a very good guideline repository to be kept at hand when developing. Keep in mind, though, this is not a reference book that explains all .net namespaces or anything like that. It is, however, a reference book on some topics, a few of them quite advanced, that any serious developer should review from time to time.
Richter and Petzold are the best!!! ;-)