One day I lost my children. They had both disappeared into the tendrils of Ender's Universe created by Orson Scott Card. Of course I had to follow them. I stand awed by the world building in this series as well as the permutations of stories that spring from Ender Wiggin's journey. If you write sci-fi, Ender's Game is a must. Anyone who hasn't experienced the wonder that is Ender's story, is cheating themselves out of a great adventure.
I can't wait for the movie.