Dark Wolf by Kate Douglas

Sebastian Xenakis is still coming into his power as a wizard. He can shapeshift by magical means and runs as a wolf using the power he draws from the elements. But young women are dying—raped by a human and then slaughtered by a wolf. Suspicion falls on the shapeshifting Chanku, but Sebastian wonders if he might somehow be guilty of the crimes.
Then he meets Lily Cheval, the uncrowned princess of the powerful Chanku, and realizes he will do whatever it takes to clear his name and win her love. But evil walks where Sebastian goes, and there are mysteries neither Lily nor her father, the powerful wizard, Anton Cheval, cannot unravel. Is Sebastian the perfect mate for Lily, or is he instead, one she should fear?