This work is a splendid example of the new emphasis of the publisher on producing comprehensive works in a handy cheap format compared with the earlier broad brush treatments which covered too much in too little detail.
The new emphasis is on sets covering various national armed forces in as much detail as is available, consistent with the current purpose of the works in the series, which have evolved from an original emphasis on serving the military miniature maker market into works intended to enlighten the general reader in enough detail to satisfy the merely curious and to point the way to further reading.
Most of us, including myself, have little need for, or the patience to read, voluminous studies, often in foreign languages, covering many eras and nations. My main interest is in the US forces, their allies and their enemies in the twentieth century.
That said, these works should be purchased as presented, in sets within the series. Since they are produced as a set, the volumes cover only relevent parts of the general history and the clothing and individual equipment is covered as it appears in each period. The French Army, US Army, British Army, and Italian Army series all have three volumes, covering the major theatres and time periods of the war. The German set has five.
The German Army set should be read in conjunction with many other individual volumes covering their allies and opponents and the other German fighting forces such as the Waffen SS, and the Parachute units, which were part of the German Air Force, the Luftwaffe.
If you want an introduction to the fascinating variety of clothing and equipment of the forces covered, this set is for you.