Ender's Game was published in 1970s. The series is more military sci-fi than dystopic. I read it about 8 years ago in high school. I've also read Ender's Shadow, Speaker for the Dead, and half of Shadow of the Hegemon. There are more books for this universe, but I'm content with how much I read already. I recommend Ender's Game and Ender's Shadow.
Speaker for the Dead is the drama and biological science part of the series. I don't remember military in it. I liked most of it, but maybe I didn't understand a dark moment at the end. I didn't think I'd read it again, but now I think I might. As a heads-up, Speaker for the Dead has Portuguese dialogue that isn't translated. Because I know some Spanish, I was able to understand some lines.
Any movie ad for Ender's Game gets me excited. I am most excited to see the training room on the screen! :D A key element of the story though is compassion. Here's the trailer:
This video states the similarities and differences between Ender's Game and The Hunger Games:
The trailer for Ender's Game left me with some goosebumps, but The Hunger Games' 2nd movie, Catching Fire, left me teary.
I thought Divergent was coming out next fall, but the release is March 2014. I'm still on the library's waitlist for the book, but now I know I can read Brave New World first.
For now, I'm interested in watching Guillermo Del Toro's movie Pacific Rim next month.