What makes this book so excellent is the quality of the photos and line drawings. Everything is covered in a single source- hull, chassis, powerplant, suspension, turret, armament, armor, equipment- it's all there.
Two minor irritants, first is that many of the line drawings have not been translated from the German orginal. Secondly, many of the photos & drawings about the Sturmgeshutz (self propelled gun varient) are duplicated in Spielbergers work on the Sturmgeshutz.
An excellent work, a valuable collection to anyone's collection, highly recommended.