During the defensive battles on the eastern front, the need for a successor vehicle on a Kampfwagen IV chassis became noticeable, because the 2 small series of such vehicles on a Panzer III chassis were almost used up in the summer of 1943 and the following months. Therefore, in the second half of 1944, corresponding development orders were placed with German industry, which quickly ended in proposals for the Brummbär.
German & English texts, 396 photos (167 historic photos, 208 colour photos of the surviving vehicles in public and private collections, 21 colour photos of models), 21 coloured camouflage schemes and 25 scale drawings.