Every version of Ender's Game — the books & films, compared across media.
The world of Ender's Game begins with a humanity that has already survived two devastating wars against the Formics — an insectoid alien species — and now bets its survival on its most gifted children, trained to become military commanders. That same story has been told across two media: Orson Scott Card's original 1985 novel and the 2013 film adapted from it.
Yes. The 2013 film Ender's Game is adapted from Orson Scott Card's 1985 military science fiction novel of the same name, which depicts a future Earth training gifted children to fight an alien threat.
There are two versions covered here: the original 1985 novel Ender's Game by Orson Scott Card, and the 2013 film Ender's Game adapted from it.
The 1985 novel Ender's Game is the original source; the 2013 film Ender's Game is the adaptation. Either works as an entry point depending on whether you prefer reading or film.