A Promise of Peridot - book 2

Arwen Valondale is sailing for the mysterious Kingdom of Citrine after the battle of Siren's Bay. Reeling from shocking revelations and her newfound powers, Arwen directs all of her pain and rage toward the man who betrayed her: King Kane Ravenwood.
Kane's presence is unavoidable as he travels with Arwen and her friends to seek the Blade of the Sun, a legendary weapon inextricably tied to her fate and the future of the realm. Even an uneasy truce proves difficult as Arwen fights against her unresolved feelings for Kane, who is willing to become darkness itself to protect her.
As Arwen faces creatures, foes, and magic beyond her wildest imaginings, she must discover the secrets of her past to defeat the monstrous Fae king Lazarus. But finding the light within might mean the death of her and everyone she loves.