The Queen of the High Fields by Rhiannon A Grist

Two misfits, Carys Price and Angharad 'Hazard' Evans, strike out from their disenfranchised seaside town to take ownership of the High Fields, a mythical island brimming with world-bending promise.

Objecting to the demands of modern society, they hope to find a place where they can live as they choose, but instead they find an ancient power that tears their friendship apart.

Ten years later, Carys returns to the collapsing world of the High Fields to face the terrifying power of the friend-turned-goddess she left behind.