Renn Kasder traveled through another world with a head full of hard-core industrial knowledge. In this old age dominated by knights and magic, he believed in only one thing: caliber is justice, and truth is everywhere within range.
From the first steam engine to the first nuclear reactor, from the black smoke billowing ironclad ship to the jet plane piercing the sky. He shattered the backbone of feudalism with the torrent of steel, and illuminated the shadow of divine power with the light of electric light.