A World Out of Time: A Novel Hardcover – January 1, 1976 by Larry Niven 
 
After 200 years in cryosleep, Jaybee Corbell awakens to find that his mind has been downloaded to another body and he's in servitude to a harsh future State. After his escape via a spaceship, he traverses such vast distances--with accompanying time dilations--that he returns to Earth 3 million years later to discover a world wholly alien to the one he'd left. A.E. van Vogt wrote, "This fantastic novel is a mix of Niven hard science and a time-travel concept to boggle the mind."

"This fantastic novel is a mix of Niven hard science and a time-travel concept to boggle the mind...even after the last line the feeling remains of the story still rushing on into the magic distance of the universe."
- A.E. van Vogt

"Niven's intoxicating concepts, ideas, scientific extrapolations, and exotic hardware buffle up from every page. Rich in imagination and astonishing in breath ... will challenge the most sophisticated readers."
- ALA Booklist

"Terrific fun!"
- Kirkus Reviews

"His tales have grit, authenticity, colorful characters and pulse-pounding narrative drive. Niven is a true master!"
- Frederik Pohl

"Larry Niven is one of the giants of modern science fiction."
- Mike Resnick

"Our premier hard SF writer."
- The Baltimore Sun

"Niven...lifts the reader far from the conventional world -- and does it with dash."
- The Los Angeles Times

"Niven...juggles huge concepts of time and space that no one else can lift."
- Charles Sheffield

"In creating a geologic world and in the interactions between humans and aliens, Niven is superb."
- Boston Sunday Globe

"One of the genre's most prolific and accessible talents."
- Library Journal

"The scope of Larry Niven's work is so vast that only a writer of supreme talent could disguise the fact as well as he can."
- Tom Clancy
 
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