Titles by Clifford D. Simak marked with tag: aliens
- 1982 - Special Deliverance
- 1981 - Project Pope
- 1980 - The Visitors
- 1978 - Mastodonia
- 1976 - Shakespeare's Planet
- 1970 - The Thing in the Stone
- 1968 - The Goblin Reservation
- 1965 - All Flesh Is Grass
- 1963 - Way Station
- 1960 - The Trouble with Tycho
- 1959 - No Life of Their Own
- 1953 - ... And the Truth Shall Make You Free
- 1953 - Retrograde Evolution
- 1952 - The Fence
- 1951 - Beachhead
- 1950 - Seven Came Back