During the Second World War, interest in self-propelled guns-armored vehicles without turrets but equipped with powerful casemate-mounted guns-rapidly spread across several nations, starting with Germany. Italy also embarked on the development of these vehicles, initially adapting the M13/40 tank. The first models, armed with 75/18 mm cannons, quickly proved highly effective. This special 120-page volume brings together all previously published studies on these vehicles, enhanced with newly uncovered content. The book traces the evolution of self-propelled guns, from the earliest and most rudimentary prototypes developed after the First World War to the most advanced and high-performance models. It features detailed examinations of over 132 different designs, accompanied by numerous rare images, vibrant color photographs, and more than 53 meticulously crafted profiles! New album format and layout 8x10 inch for 120 pages!