In the first novel, They Shall Have Stars, man has thoroughly explored the Solar System, yet the dream of going even further seems to have died in all but one man. His battle to realize his dream results in two momentous discoveries -- anti-gravity and the secret of immortality. In A Life for the Stars, it is centuries later and antigravity generations have enabled whole cities to lift off the surface of the earth to become galactic wanderers. In Earthman, Come Home, the nomadic cities revert to barbarism and marauding rogue cities begin to pose a threat to all civilized worlds. An armada of renegade cities attempts to destroy Earth, their ancient birthplace. In the final novel, The Triumph of Time, history repeats itself as the cities once again journey back into space making a terrifying discovery which could destroy the entire Universe. A serious and haunting vision of our world and its limits, Cities in Flight marks the return to print of one of science fiction's masterpieces.