Yes, Yes, a million times, Yes! Ender's game is a fantastic sci-fi book that delves into the mind of a tactical genius. I have read the book three or four times and each time I learn something new. The biggest part of this book is that it teaches what it means to be human, not so much by comparing the humans against the invading alien species, "The Buggers", but by analyzing the mind of this one being- Ender. The author of the book, Orson Scott Card, brilliantly gives the reader a chance to look at the world through a whole different perspective.
Throughout the book, however, (and the rest of the series) is a more subtle theme of racism and genocide. The buggers, while being an invading force, are also an intelligent species. Their mistake was to not realize that the humans were also an intelligent species, because of their differences, until it was too late. The first book ends with the brutal, near-complete destruction of the bugger race. During the course of the story, Ender learns more about them and comes to realize that though they are different, they too deserve a chance to live. This cross-species friendship speaks to the idea that all beings, no matter how different, deserve the basic right to life and the possibility of coexistence. On a simpler scale, no matter what people believe or what they look like, they still deserve respect and the opportunity to participate in the world just as much as the next person.