Book 30

A Case of Conscience

by James Blish

Published 12 September 1972
Father Ramon Ruiz-Sanchez S.J., is a part of a four man scientific commission to the planet Lithia, there to study a harmonious society of aliens living on a planets which is a biologist's paradise. He soon finds himself troubled: how can these perfect beings, living in an apparent Eden, have no conception of sin or God? If such a sinless Eden has been created apart from God, then who is responsible?

Cities in Flight

by James Blish

Published 21 September 1981
James Blish's galaxy-spanning masterwork, originally published in four volumes, explores a future in which two crucial discoveries -- antigravity devices which enable whole cities to be lifted from the Earth to become giant spaceships, and longevity drugs which enable their inhabitants to live for thousands of years -- lead to the establishment of a unique Galactic empire.