The Rosewater Redemption

This book took every idea raised in the first two books and drove them to their brutal, logical conclusions in the most chaotic way possible. POV was a bit more experimental maybe than the other two books (Rosewater was pretty straightforward Third Person One Guy, Insurrection was multi-POV third person, but Redemption is third-person semi-omniscient being narrated aloud to you by a time-travelling ghost, so things go places) which didn't work for some people but I liked it. The characters are almost universally terrible people making stupid decisions but somehow it works and you're still invested in what happens to them.