If you don’t already own the Kindle or Nook version of Ender’s Game, the ebook is on sale now for $3.49.
Although I own a hardcover and a paperback of Ender’s Game, having the ebook version is very handy because it allows you to search the book easily (how else do you think I was able to count all the instances of the word “love” for Valentine’s Day?) and you can access it on your phone as well with the Kindle app.
Buy the ebook on Amazon or at Barnes & Noble.