The 1956 Hugo ballots for Best Novel were:
- Double Star by Robert A. Heinlein [Astounding Feb,Mar,Apr 1956]
- Call Him Dead, by Eric Frank Russell
- The End of Eternity, by Isaac Asimov
- Not this August, by Cyril Kornbluth
- The Long Tomorrow, by Leigh Brackett
For a little perspective, the Hugos were established in 1953.