This book contains five photo albums of pictures taken by German soldiers fighting on the Eastern Front during 1941. Of the five only one has a name attached, Josef Kaloenbach, but even he isn't well documents and as with the other four his role has to be guessed from the photos.
Most of the captions are accurate, although I did find one where a wrecked Panzer III is mis-identified as a KV-1 (the two tanks did have very similar arrangements of wheels, but the superstructure front and turret shape are clearly that of the German tank). Quite a few captions are qualified with 'appears to be', a valid qualifier for pictures of damaged aircraft or tanks, where key identifying features have often been destroyed.
The five albums portray different aspects of the German army. Josef Kaloenbach was probably a driver. The second album was from a panzergrenadier, the third from an infantry man, the fourth focuses on flak and artillery guns and the fifth covers the winter of 1940-41.
1 - Josef Kaloenbach's Album
2 - The Panzergrenadiers
3 - An Infantryman's War
4 - Flak and Artillery Collection
5 - Towards the First Winter
Author: Jon Sutherland and Diane Canwell
Publisher: Pen & Sword Military