Books Recommendation

During this week I re-read two book one called Ender's Game and the other its sequel called Speaker for the Dead, both books by Orson Scott Card. Both books talks about different races and how we treat them, fear, loath, hate. Both book were published in 1985 and 1986.
Ender's Game is about the main character, Ender, who is, at the age of six, smarter than almost everyone, including professors and teachers. He has an older sister, Valentine, and brother, Peter. Valentine is a soft, kind girl with too much compassion in her heart to be used and Peter is this cruel, evil person who enjoys skinning Squirrels alive. The Battle School (a bit like the spaceship force) hoped Ender to be in between passion and cruelty, passionate enough to love his army,get along with everyone, but cruel enough to survive and kill their enemy the Buggers.
The Buggers are alien species way more high technological than humans.However, they are like ants because they have queens that control the soldiers and communicate with each other using telephy.The Buggers are man's worse enemy and the nightmare of children, or so we think.
At first, Ender is picked to become a strategist at a space command school. At school, he is picked on and isolated because he is the smartest. The teachers torture him every chance they can in every way possible. First, they stop him from making friends, then after he miraculously makes some friends, they get taken away from him. At battle school, there are different troops or squads. Each squad has its leader. Ender gets picked after a year there when most people are chosen when they have more than two years years of experience. The teachers give Ender a whole new bunch of Launchies or newbies. They expect Ender to form them into an excellent team. Ender recognizes the challenge for what it is but goes ahead and makes his army into a legend, an unloosing legend. The teachers then continue there "fun". They start giving him two battles on the same day, disable there weapons, send two teams against them, give the other team a five minute head start, stuff like that. Though Ender wins all the challenges, he is tired and almost dieing from the pressure on him. The school knows he is about to quit so they send him off to command school, a place where people are sent when they are almost fifteen. Of course Ender doesn't want to go, so the commander, Griff, finds Ender's sister Valentine, the only person who was kind to Ender, to persuade him to go. He does.
At Command School, Ender is isolated from everyone else. This time instead of making everyone hate him, they don't give him the chance of even meeting the same person twice! At the battle school, Ender meets Mazer Rackham, the legendary hero of the Second Bugger wars. Mazer stayed alive by traveling through light (in the book, two weeks may past in light speed when in reality twenty years had blown away) to train the next strategist. Ender gets tricked into playing a strategy game which he thinks is against Mazer and is fake. However in reality the war had already started. The games Mazer had called "practice" were actually real battles with the Buggers. After Ender blows up the entire Bugger planet, he finds a place from his computer games. He follows the direction and finds the last of the Bugger queens in an egg sack. Then does Ender understand the Buggers so becomes the Speaker for the dead and writes two books, one on humans and one on the Buggers.