The only reason it got two stars versus one is because I finished it. I only give one star to DNF books. Had I actually read the book versus listening to audio than it probably would've been a different story. The narrators use of differentiating the characters was probably the only thing I liked about this book. 
 Just imagine a book where; 
 - Girls are inferior to boys it's automatically assumed. 
 "A few girls. They don't often pass the tests to get in. Too many centuries of evolution are working against them." 
 - After reading up on the author (after I finished the book so I wasn't biased) I found out he's a conservative homophobe. It all makes sense now since I'm on the complete opposite of that spectrum. 
 - The first half of the book is spent forcing Ender to become "an individual". In this I mean they turn a 7 year old child into a battle genius by singling him out and tricking other kids into hating him. They force nobody to like him so that way he has nothing better to do with his time other than study "the game." Then it's just battle scene - bullying - battle scene - bullying - battle scene - bullying. Am I getting repetitive yet? Because that was pretty much the entire book. 
 - Ender (our main protagonist) is an abusive child (view spoiler)[who kills two other young boys (hide spoiler)] but is "forgiven" because he's just a child that THEY manipulated into being that way?! Like...WTF?! Except we're told the whole book how "good" this kid is? I don't see it.