What lessons about life are readers supposed to take away from it?

     My book is Ender's Game. The main character is Ender Wiggin. He was sent to space to train for an alien invasion. He was a troop for somebody else but then they promoted him to Captain for the abandoned team the Dragons. They won every game. Then he was sent to another planet to train in a simulation. In the last simulation he was tricked and he fought the actual enemy. He was mad because they waited and he didn't know what they wanted.

     The name of my book is Ender's Game. This book is about how kids are sent to space to fight an alien invasion. The main character's name is Ender Wiggin. The conflict in my book occurs when Ender gets taken to another planet to train to be the fleet commander. The book teaches lessons about how you shouldn't destroy something before you really know what it wants. The moral of the story is that before you do something, think about it first. In the story for example, for the final battle the aliens were waiting, Ender thought it was a simulation so he charged at them. He managed to destroy or make them extinct for good. After that Crl. Graff told that is wasn't a simulation, it was the real battle. Ender didn't know what they wanted because they were waiting. I believe that reader's should read this because this book teaches you a valuable lesson. In my opinion the author is trying to teach the reader's to think before you do something. Don't have poor impulse control.