Ernst Obermaier's books "Die Ritterkreuzträger der Jagdflieger" and "Die Ritterkreuzträger der Stuka and Schlachtflieger" were first printed in the 1960s and 70s. Later revised, these titles are still considered standard works on the subject. Obermaier planned a third volume, which was to have dealt with Knight's Cross winners from the bomber arm. Work on the book had begun, but was far from complete, when Ernst Obermaier died unexpectedly in 1997. Jochen Kaiser took over Obermaier's files and together with a number of German aviation historians, continued work on the project. After more than 10 years of research, he has now completed his study in two volumes.

Volume 2 covers 165 Ritterkreuzträger with the letter L till Z and one Oak Leave amendment, corrections and additions, photos of award ceremonies, successful crews, group photos, funerals and graves, as well as documents and log books. The book is illustrated with a portrait photo and three or four other photos each winner of the Swords and the Oak Leaves, and two photos of each winner of the Knight’s Cross, a portrait photo and another photo depicting a milestone event, an aircraft or a mission tally on the tail of an aircraft.

65 years after the end of the war, this work by Jochen Kaiser fills a gap in the history of the Luftwaffe. These books will make it possible to finally identify many of the bomber crewmen who won the Knight's Cross. This volume also documents the military careers of these men for posterity, factually and without glorification or political bias. They thus represent a special reference work of contemporary history.