When Myles Cabot, inventor of radio transmission of matter, found himself alone on an unknown continent of the planet Venus, he realized that getting back to his old headquarters and his loved ones presented some impossible problems. He'd have to settle a war between primitive natives and an unholy alliance of monsters, dinosaurs and giant insects. He'd have to build an electronic device from raw rocks and untapped resources. And if he succeeded in all that, he'd still have to find his way home
What is the mystery centered in Jupiter's famous "Red Spot"? Two fighting Earthmen, caught by the "Pipe-men" like their vanished comrades, soon find out.
In the distant future, the interstellar starship Calypso and its human crew encounter a gigantic megastructure inhabited by ancient robots known as the Custodians. As the humans, led by Lieutenant Brenda Ivanova, attempt to restore ancient data to uncover the robots’ origins, they face ethical dilemmas about the nature of self-awareness and the evolution of these machines. Amidst philosophical debates and crucial decisions, leading the humans to rethink how to aid these robots in their evolution
In one place, a descendant of the Vikings rode a ship such as Lief never dreamed of; from another, one of the descendants of the Caesars, and here an Apache rode a steed such as never roamed the plains. But they were warriors all.