The first thing to be aware of with this book is that the author used IIS 7.0 on Vista, not Windows Server 2008. As such, many features (such as shared configuration, network load balancing, remote management service etc) are not discussed at all. Additionally the author uses the IIS 6.0 Manager to manage remote IIS instances.
On a more positive note, the author does have approximately 1/2 the chapters devoted to getting various application technologies working and configured on IIS (e.g. ASP.NET, PERL etc), which isn't a topic that is adequately covered in many other books.
However in 300 pages it is hard to do justice to both IIS administration and configuration, as well as be comprehensive on .NET, database and 3rd party application framework configuration.
As an initial overview for people unfamiliar with IIS 7.0, this is an OK book (aside from the fact that Vista is used). The fact that Vista is used, unfortunately, means that the author has missed a number of significant additional components in IIS 7.0 (e.g. the application performance chapter doesn't appear to mention the Runtime Status and Control API/RSCA), and as such the book really needs an update to Windows Server 2008.
Disclaimer: I am an author for a competing IIS 7.0 book (though from the same publisher)