It's as good as it gets right here. And Vol. 2 is just as good. Both are photo references with page after page, literally hundreds of (high quality B&W) photos focusing on all well-known Luftwaffe fighter aces (in flight suits or their Uniforms) and the Fighters that made them famous. Plus, several profiles (B&W) with camouflage patterns and the color section with many (excellent) color photographs and more profiles (2 page each color profile)
This volume covers JGs 1, 2, 3, 4, 5, 6, 7, 11, 26, 27, 44, 51 and 52.
Excellent book for modelers or enthusiasts of the WW2 air war.