The Poppy War by R.F. Kuang / ★★★★☆
Summary: Rin defies the odds and passes the Keju, a prestigious test that gets her a spot in Sinegard, the nation’s most prestigious military school in the nation. From there, she continues to work her way to the top and discovers she is capable of things beyond what she thought possible. When a terrible war against a nearby country begins, Rin is pulled into something more deadly than she ever would have expected, and goes to impossible lengths to avenge her people.
I have become something wonderful, she thought. I have become something terrible.