Amazon.com (ISBN 1568492871, Hardcover)

Juan Rico signed up with the Federal Service on a lark, but despite the hardships and rigorous training, he finds himself determined to make it as a cap trooper. In boot camp he will learn how to become a soldier, but when he graduates and war comes (as it always does for soldiers), he will learn why he is a soldier. Many consider this Hugo Award winner to be Robert Heinlein's finest work, and with good reason. Forget the battle scenes and high-tech weapons (though this novel has them)--this is Heinlein at the top of his game talking people and politics.