Description: After thirty years trapped in suspended animation, a man uses a time machine to go back and exact revenge on his friend and fianc_e for stealing his business. Aman travels back in time to get revenge, thus altering his future. originally serialized in The Magazine of Fantasy & Science Fiction (October, November, December 1956, with covers and interior illustrations by Frank Kelly Freas) and published in hardcover in 1957. It is a fast-paced hard science fiction novel, with a key fantastic element, and romantic elements. In three separate Locus Magazine readers polls from 1975 to 1998, it was judged the 36th, the 29th, or the 43rd all-time best science-fiction novel.