Parts of this book were published as separate short stories in The Magazine of Fantasy and Science Fiction: “Time Patrol” May 1955; “Delenda est” Dec 1955; “Brave To Be A King” Aug 1959; “The Only Game in Town” Jan 1960; “Gibraltar Falls” Oct 1975. Guardians of Time collection was first published in Oct 1962; “Gibraltar Falls” was added to it in Oct 1981 edition

Manse Everard is a man with a mission. As an Unattached Agent of the Time Patrol, he's to go anyplace—and anytime!—where humanity's transcendent future is threatened by the alteration of the past. This is Manse's profession, and his burden: for how much suffering, throughout human history, can he bear to preserve?