An excellent reference source for the U.S. Army's self propelled artillery piece, this book gives a history of the vehicle and its service in many of the world's militaries. Geared toward the serious military scale modeler, each detail photograph is captioned with detailed descriptions, covering such details as differences between variants, interior details, exterior details, power plant, armament, ammunition, maintenance, stowage, service, etc. This volume set the standard for comprehensive detailed coverage that would become legendary in the military scale modeling world. A MUST for any military enthusiast, modeler, or historian.