Jack Williamson

From the depths of space the Seeker had come, to make the Solar system her nest. The invader was defeated, but not before the Earth was ravaged, its technology destroyed and its inhabitants reduced to barbarism. Mankind's only chance for salvation lay with the alien Eldren - but the Eldren considered humanity …

Brother to Demons, Brother to Gods begins with a genetic engineering program conceived by the Smithwicks, a family of "Creators" who first improve on inadequate Homo sap ("preman") with two laboratory species and then come up with the "stargods." These powerful Frankenstein fabrications, however, send the Creators …