The First Ember — Meg Hendry

Kian wants to escape the archers of Raesidia. Escape hunting those he doesn't believe should be hunted. When the chance comes, it isn't what he hoped for. The world ender is preparing to return to Fortius. And no one believes she's real. Kian and three others were foretold to stand against her, but the future has changed. The First Ember is a novella. The Four Knights is a prequel series to Darkest Depths.