A Sterkarm Kiss (Sterkarm #2)
Susan Price

But things on the 16th side are not what Andrea expected them to be. Per doesn't know who she is, and a wedding between the Sterkarms and their enemies, the Grannams, ends in bloodshed and confusion. Even when Andrea discovers it's the Elves who have betrayed them all, no one wants to believe her. She may have made the biggest -- and the deadliest -- mistake of her life.
In this blistering sequel to her award-winning the sterkarm handshake, Susan Price weaves a riveting tale of revenge, deceit, and love, set against a backdrop of warring clans and brutal passions.