Beastkeeper

Her mother hates the cold, so Sarah and her family have always been on the move. Every few months her parents pack their bags and drag her off after the sun. She's grown up lonely and longing for magic. When Sarah's mother walks out on their family, all the strange old magic they have tried to hide from begins to surface. Her father begins to change into something wild and beastly, but before his transformation is complete, he takes Sarah to her grandparents―people she has never met. Deep in the forest, in a crumbling ruin of a castle, Sarah begins to untangle the layers of curses affecting her family bloodlines. She discovers that the curse has carried over to her, too. The day she falls in love for the first time, Sarah will transform into a beast - unless she can figure out a way to break the curse forever.