Machineries of Empire is a trilogy of military science fiction/science fantasy/space opera novels by American writer Yoon Ha Lee and published by Solaris Books. It consists of Ninefox Gambit (2016), Raven Stratagem (2017) and Revenant Gun (2018). The trilogy follows the young infantry captain Kel Cheris and the traitorous general Shuos Jedao in a war among factions of a despotic interstellar empire, the Hexarchate, whose esoteric technology is based on the population's adherence to the imperial calendar.The novels cover "space opera, fantasy, Korean folklore and mathematics" themes. Several of Lee's short stories are prequels to the trilogy. Source: Wikipedia (en)