Mostly original German documentation about ordnance and equipment, including comic book style primers on the Tiger I and Panther tanks, and the V2 rocket.
FZG 76 (AKA V1) Rocket Operator and Maintenance Manual. Dated April 1944. This is a dry technical manual vs the more fun Tiger, Panther and A4 (V2) primers.
A4 Fibel A4 Primer Primer on the A4 / V2 rocket. I don't know why there are penguins on the cover, other than the fact that the color scheme for many of the rockets was black and white.