The Blood Trials by N. E. DavenportRead about the other entries on the list.
When Ikenna’s grandfather, the former Legatus, is murdered, she knows that someone on the Tribunal must be responsible. But the only way to get answers is to get close, and she decides to do that by joining the Praetorian Trials of Mareen. They’re a grueling challenge that only one-quarter of the contestants survive, and subjecting herself to not only the danger but also Mareen’s racist and sexist society, Ikenna fights to get her revenge.
--Marshal Zeringue