Nightshade (Nightshade Series #1)

Calla is the alpha female of a shape-shifting wolf pack. She is destined to marry Ren Laroche, the pack's alpha male. Together, they would rule their pack together, guarding sacred sites for the Keepers. But then, Calla saves a beautiful human boy, who captures her heart. Calla begins to question everything - her fate, her existence, and her world and the orders the Keepers have asked her to follow. She will have to make a choice. But will she follow her heart if it means losing everything, including her own life?