What can I say about a classic? I first read this book when I was in high school, and it shaped my world view. Far more than a mere science fiction book, it explores the moral question of what it means to be a citizen. Along with opening the ideas of military life, politics, and the right and wrong of using deadly force, it presents questions of life and death.
Intriguingly enough in an era of white-bread uniformity, Heinlein chooses a young Filipino boy to embody the virtues of citizenship.
One of the best books I have ever read, it never loses its appeal.