Chain-Gang All-Stars (by Nana Kwame Adjei-Brenyah)

Wow, I loved this. A near-future and extremely plausible dystopia, where prisoners are forced to fight to the death for corporate sponsorship and entertainment.  Woven throughout are statistics about real prison conditions, inequities, etc. And Adjei-Brenyah absolutely nails the ending, I won't say any more than that, except that it's unflinching and exactly right.

Going into it, knowing nothing except the descriptions of the books, this one was my vote for ToB winner. I think it might be the one I go for in my bracket.  It's bold, of-the-moment, and masterfully written. Loved it.