Robert Kann was a Viennese Professor of History who taught at several American universities during his career. He was a recognized authority in his field, and this volume is one of the very best general histories of the Habsburg Monarchy currently in print. However, it was written in Professor Kann's second language, English; so the reading is choppy at times. In addition, the subject matter is extremely complex; so if you are expecting a page-turner, this may not be for you. Overall, if you want to know about the last 400 years of the Habsburgs, there are few better sources.