Finished reading “Ender’s Game (Ender’s Saga Book 1)” by Orson Scott Card, first published in 1985.

Goodreads Andrew “Ender” Wiggin thinks he is playing computer simulated war games; he is, in fact, engaged in something far more desperate. The result of genetic experimentation, Ender may be the military genius Earth desperately needs in a war against an alien enemy seeking to destroy all human life. The only way to find out is to throw Ender into ever harsher training, to chip away and find the diamond inside, or destroy him utterly.