The 40mm Bofors Gun, first produced in the 1930s, has become one of the most famous artillery pieces of all time. It shows no sign of fading from the defense scene even though, in the second decade of the twenty-first century, it performs in many roles that were not contemplated by its original designers. It has also proved to be so versatile that it is now allied to electronic and other technological marvels that were mere pipe dreams only a few years ago. Terry Gander’s comprehensive account of the history of this remarkable weapon over the course of almost eighty years is fascinating reading and an invaluable work of reference for military historians and artillery specialists alike. It is the definitive work in the field.