Original: Like Ender's Game, the book won the Nebula Award in 1986, and the Hugo Award in 1987, making Card the first author in history to win both these awards in two consecutive years.
Simplified: Like Ender's Game, the book won the Hugo Award (1987) and Nebula Award (1986) for outstanding science fiction novel, making Card the first writer to win both of these awards two times in a row.