Red Rising is the first part of what seems to be a fun, fast paced trilogy which genuinely surprises you with plot twists and that flows along like the Hunger Games once did when I read it for the first time.
There's not much about the plot you can say without spoiling the story and that's more than half the fun in this book, so I will just say I think the world building is detailed enough to feel immersive but not so much you get bored.
I recommend it if you enjoy adult fiction with some serious political questions motivating the story. Not a lot of depth to the character building though, once you get the archetypes figured out you can sort of identify everyone's role in the story.. but it still manages to be exciting fun and, oddly enough, surprising at some points.
Great summer reading, for fun and revolution!