"From acclaimed, award-winning author Jo Walton: Philosopher Kings, a tale of gods and humans, and the surprising things they have to learn from one another. Twenty years have elapsed since the events of The Just City. The City, founded by the time-traveling goddess Pallas Athene, organized on the principles espoused in Plato's Republic and populated by people from all eras of human history, has now split into five cities, and low-level armed conflict...