I #AmReading A Desolation Called Peace by Arkady Martine
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An alien armada lurks on the edges of Teixcalaanli space. No one can communicate with it, no one can destroy it.
In a desperate attempt at diplomacy with the mysterious invaders, the fleet captain has sent for a diplomatic envoy.
Their failure will guarantee millions of deaths.Their success might prevent Teixcalaan’s destruction. Or it might create something far stranger.