The primary purpose of this book is to teach, and to enable readers to study the recent literature on this subject and its many applications. It is suitable for graduate-level courses in functional analysis and operator algebras, and as a reference for self-study by graduates.
This is an amazing book. The first four chapters are crystal clear but for some reason the fifth chapter abandons the style of the first four and becomes slightly murky: Steps are skipped without indicating a missing piece (a note like "(why?)" would help, for example). New symbols and notations appearing at some point with explanation given only later. Nevertheless, I would highly recommend it to anyone interested in learning or teaching operator algebras.