Titles by Robert Silverberg marked with tag: aliens
- 2019 - Alien Archives
- 1992 - Kingdoms of the Wall
- 1987 - The Iron Star
- 1971 - The Science Fiction Bestiary
- 1970 - The Reality Trip
- 1970 - Tower of Glass
- 1969 - Downward to the Earth
- 1969 - The Man in the Maze
- 1967 - Those Who Watch
- 1962 - The Seed of Earth
- 1961 - Collision Course
- 1959 - The Dawning Light with Randall Garrett
- 1959 - Which Was the Monster?
- 1958 - A Little Intelligence with Randall Garrett
- 1957 - The Shrouded Planet with Randall Garrett