Below is a review taken from another site:
Ender's Game (1985) is a military science fiction novel by American author Orson Scott Card. Set in Earth's future, the novel presents an imperiled mankind after two conflicts with the "Buggers", an insectoid alien species. In preparation for an anticipated third invasion, children, including the novel's protagonist, Ender Wiggin, are trained at a very young age through increasingly difficult games including some in zero gravity, where Ender's tactical genius is revealed.
The book has become suggested reading for many military organizations, including the United States Marine Corps. Ender's Game won the 1985 Nebula Award for best novel and the 1986 Hugo Award for best novel. Its sequels, Speaker for the Dead, Xenocide, Children of the Mind and Ender in Exile, follow Ender's subsequent travels to many different worlds in the galaxy. In addition, the later novella A War of Gifts and novel Ender's Shadow take place during the same time period as the original.
My own review:
I read this book via audible.com in April 2014. I have always liked Science Fiction and I enjoyed reading it very much. Very entertaining. Didn't like the last chapters as much as the earlier part of the book.