I finally got my copy and after reading most of it in one go I have to say that this book simply should be considered the official ATL developer's guide. It covers all aspects of ATL, including its flaws and pitfalls, and really shows the simplicity, flexibility and elegance of ATL. The authors go beyond enumerating (pun) the classes and their purposes but dwell into the internals and plumbing of ATL, thus justifying the title. The book reflects the authors' active part in the ATL community, their engagement in the ATL mailing list and forums. If you're a developer eager to leverage your COM and ATL knowledge and understanding, this book is a must !