John M. Browning is widely regarded as the greatest firearms inventor the world has known. He devised over 80 distinct guns, including the Browning Automatic Rifle. His Mormon father was a gunsmith and John began taking gunsmithing seriously when he was 7. At 13, he repaired an utterly hopeless wreck of a gun and his apprenticeship was over. At 25 (1880) he built and operated his own factory. At 34, he began building his first gas operated machine gun and soon he was developing a semi-automatic pistol. This biography by his son reveals a man of extraordinary ingenuity, enacity, humor and wisdom.