"Cibola Burn" by James S.A. Corey, so The Expanse #4. I like the TV series a lot (watched first, before reading the books), I really liked "Leviathan Wakes" and "The Butcher of Anderson Station", but the second and third volumes were meh. The second one is too similar to the first one and the third one, I don't know, just didn't click. "Cibola Burn" is good, finally the themes have changed, the setting has changed (Ilus) and there are new mysteries to uncover (well, I watched the TV series, so the story is kinda spoiled for me, but it's not like I remember everything).