I haven’t read it but maybe A Memory Called Empire by Arkady Martine? Political space opera where the MC is trying to solve the murder of her predecessor

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ok gideon the ninth is kind of like this, necromantic heads of state and their bodyguards are being picked off on a closed planet after they answer the summons of the emperor to try to become part of his exclusive honored legion. if you want everyone in space suits it probably won’t scratch the itch, but there is space travel and futuristic techologies

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Download fable and find groups that tailor to what you like. That’s what I always do when I’m looking for niche reads

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