Ender's game describes our world in the future. Our planet is overpopulated and a war between humans and an alien race called "buggers" manages to unite humanity in fear of the bugger's next and third attack. An International Fleet (IF) is established and they breed genius children to train the best of them as strategic genius soldiers. 
 6 year old Andrew "Ender" Wiggin, who stays with his parents, his beloved sister Valentine and his sadistic brother Peter, is the only person who can maybe save humanity as the next battle's strategic genius general. 
 So he is taken away from his family to a battle school in earth's orbit, isolated and put under constant pressure, to prepare him for real battle. 
 I felt that the writing was mediocre at best. None of the characters made me feel strongly about them. Even though one could feel sorry for Ender for the circumstances he has to grow up in, I did not, because it is hard to feel sorry for someone who always wins and is always the best at everything he does. 
 More than anything, I hated the dialogues, the word "fart" seemed to appear in almost all of them. 
 The narration randomly jumps from 1st to 3rd person and back. 
 The major part of the story takes place on the battle school, and that part just repeats the same scenario again and again, with slight variations. 
 In spite of the writing style, the story as such is well drafted. 
 I did like the world building. Due to overpopulation, most families are not allowed to have more than two children. Human colonists venture to other worlds, which I found neatly described. There are interesting ideas about buggers and military strategy. 
 All in all Ender's game was an ok read for me but I don't think I'll read anything by Card any time soon again.