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Starship Troopers by Robert Heinlein is a good one. Forget the movie - it's basically a parody of the book which the director admitted he never read.
Let's see... Von Neumann's War by John Ringo is both well-researched and entertaining. Never got into his Posleen series and I'd advise staying far, far, FAR away from the Paladin of Shadows series, but the Troy Rising trilogy is good.
Leviathan Wakes is another good one, they're working on the fifth book in that series along with a high-dollar Syfy show, "The Expanse." In case you haven't deduced it yet, I read a lot of science fiction. 😋
(But seriously, DON'T read "Paladin of Shadows." Google the term "OH JOHN RINGO NO" for an excruciating (yet morbidly amusing) rundown as to why not.)0THIS IS NOT RELEVANT ANYMORE