These are the Hugo Award winners for best science fiction novel during the decade from 1953, the first year Hugos were awarded, to 1959.
1953
The Demolished Man
Alfred Bester
1955
They’d Rather Be Right
Mark Clifton
Frank Riley
1956
Double Star
Robert A. Heinlein
1958
The Big Time
Fritz Leiber
1959
A Case of Conscience
James Blish
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