Runespell: Legends and Lore — Sela Carsen

In most fairy tales, the prince rescues the princess. It's not often she gets to return the favor. Mai Westenra is pulled into a centuries-old quest for vengeance and magic, never realizing that she'll find love in the midst of danger. Tyr Halvarsson has waited lifetimes to be rid of his curse. Resigned to his immortal half-life, one selfless act of humanity can redeem him. Or kill him. Together, Mai and Tyr must work against time and magic to perform the runespell that will save their lives and give them a chance at love that lasts.