Starship Troopers is a military science fiction novel written by Robert A. Heinlein. It is set in a future where humanity is engaged in a war against a race of insectoid aliens known as the Bugs. The story follows Juan Rico, a young man who enlists in the Mobile Infantry, a military organization tasked with fighting the Bugs. As Juan undergoes rigorous training and participates in brutal battles, he grapples with the moral and philosophical implications of war. Starship Troopers is a controversial and thought-provoking novel that explores themes of militarism, citizenship, and the nature of democracy.