His novel Ender 's Game and its sequel Speaker for the Dead both won the Hugo Award and the Nebula Award , making Card the only writer ( as of 2007 ) to win both of science fiction 's top prizes two years in a row . His novel Ender 's Game ( 1985 ) and its sequel Speaker for the Dead ( 1986 ) both won Hugo and Nebula Awards , making Card the only author to win both of American science fiction 's top prizes in consecutive years .