After civilization collapsed, a caste of "scientists" arose who operated the indestructible and eternally functioning machines and worshipped at the altars of the atomic gods. Society was a strange mix of the modern and the medieval, with armies marching on horseback into ancient spaceships, then flying to human colonies on other planets to wage war with swords and arrows. Then came the mutant Clane, with a twisted body and a brilliant mind, who not only recovered the lost science behind the ancient machines, but found that alien invaders, not human war, had reduced humanity to barbarism as a prelude to colonizing the Solar System. And they would return soon, unless Clane could stop them...For the first time, the entire Clane saga, told in the novels "Empire of the Atom" and "The Wizard of Linn", is complete in one volume. Plus the sweeping novel of interstellar adventure, "Mission of the Stars", and two additional short novels by a Grand Master of science fiction.