A collection of science fiction short stories by Arthur C. Clarke.

Contents:

Second Dawn
If I Forget Thee, Oh Earth
Breaking Strain
History Lesson (as "Expedition to Earth" in the British Edition, Sidgwick & Jackson, 1954)
Superiority
Exile of the Eons
Hide-and-Seek
Expedition to Earth (as "Encounter in the Dawn" in the British Edition, Sidgwick & Jackson, 1954)
Loophole
Inheritance
The Sentinel (basis for 2001)