Garden City, New York: Doubleday & Company, Inc, 1955. First edition. Offsetting to free endpapers, a little a fine copy in a nearly fine dust jacket with some mild rubbing to upper front corner tip and head of spine panel, a tiny closed tear to upper front panel. (17585). Octavo, illustrated by Mel Hunter, cloth. Eternals police human history against disasters, making history safe for mankind. "Time guardians rove through the centuries, keeping all eras in harmony. The hero rebels, preferring the uncertainties of infinity to the carefully controlled boredom of Eternity." - Pringle, The Ultimate Guide to Science Fiction, second edition (1995), p. 120. "... a complex, thoughtful story of time travel, time paradoxes and time police, considered by some critics to be his best work." - John Clute / Malcolm J. Edwards, SFE (online). "Perhaps Asimov's best early novel..." Barron (ed.): Anatomy of Wonder (1987) 3-18.