Necessity

Necessity is the sequel to Jo Walton's acclaimed series, exploring a society built on Plato's ideals on an island in the Eastern Mediterranean, with gods and humans intertwined. After centuries of development and conflict among five city-states, their existence catches the attention of Zeus, leading to a dramatic relocation to an alien planet called Plato. As the cities thrive and new interactions unfold—including the return of a former mortal as a god and the arrival of a human ship—this story delves into timeless themes of divine and human learning.