Varley’s first novel. Cover by Boris Vallejo.
After the effortless capture of Earth by vastly superior aliens, humanity is
forced to fight for existence on the Moon and other lumps of airless rock. The
invention of the Hotline–a constant stream of data from a star in the
constellation Ophiuchus–facilitates survival and enables the development of
amazing new technologies. Then, after 400 years, humanity's unknown helpers
send a bill for their services...and suddenly everything is threatened once
- Publishers Weekly