Armor has some superficial similarities with Starship Troopers, by an American science fiction writer who is often called what?
Armor (novel):  It has some superficial similarities with Robert A. Heinlein's "Starship Troopers" (such as the military use of exoskeletons and insect-like alien enemies) but concentrates more on the psychological effects of violence on human beings rather than on the political aspect of the military, which was the focus of Heinlein's novel. Robert A. Heinlein: Robert Anson Heinlein ( ; July 7, 1907 – May 8, 1988) was an American science fiction writer.
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