The Jasta War Chronology is a first rate piece of research, and such is nothing less than what one could expect from Norman Franks and his fellow contributors. If you are looking for a book to read cover to cover then this is not it. But valuable research it is. Simply put, it is a compilation of various raw records into a refined system which allows the reader to track the daily claims and losses of German fighter units in World War One. In essence, it fits as close to a primary source document as most can get regarding this topic, and the reader is able to follow nearly every German pilot's career. The additional explanitory notes are highly valuable, as they often show the name of the Allied flyers shot down, and their fate. One can use this material to cross-reference it to other lists and reports in order to fill in gaps regarding certain aspects of WW I aviation. Franks and his crew have certainly done their homework, and this is a "must" reference work for any serious student of WW I aviation.