Voigt, Janalyn. Tales of Faeraven #1

A prince marked for death, a princess without a kingdom, and a world at war. Unlikely travelers band together to accomplish the impossible-bring peace to their kingdom. But traitorous forces are at work, and a treacherous hand is destroying everything they accomplish. Honor and soul-searching bring the travelers to hidden truth, and when a sacrifice is made, the broken-hearted band of misfits must cleanse the evil from their midst to free their world...or lose everything

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