This book is simply superb. It sets out to provide an overview of Microsoft's COM+ technology, and to compare it with CORBA and EJB. It succeeds brilliantly. It is informative, thorough, entertaining and, almost uniquely for a technical book, very well written. Moreover, it has not been outdated by Microsoft's unveiling of .Net, the successor to COM+ and DNA. In fact, you are unlikely to find a better book than this one to introduce you to the underlying technologies that .Net is based on, at least until Sessions writes one himself. For anyone at any level of the software world (even developers) whose next move is into component-based middleware, this is the book for you.
This book is a great book for all those Software Architects wondering whether it is time to leave the Microsoft DNA arena and head the EJB route... It certainly made me reevaluate the reasons large organisations are heading the Java route!