As others have said, you can't expect that absolutely everything you will need to know to pass the exam will be spelled out in the book. Also like others, I found MSDN to be a very comprehensive and thorough source on how to build applications in the .NET environment and what .NET is all about.

So, use the book to point out the areas to work on, use MSDN to get the details, and practice writing apps. I can honestly say that that pretty much did it for me.

The weakness of the book is that, seemingly like all the Microsoft Guides, there's really no information on the makeup of the exam itself and any specifics on how to prepare. The practice test that came with the book was barely worth the investment of time that it takes to go through it. It had lots of typos and a significant percentage of the questions made little or no sense or could not really be answered from the information given.