A Siberian Werewolf in London — Caryn Moya Block

Grigori Solovyov, Siberian Lycanthrope goes to London to track down a Russian mobster who is stealing from the pack. Then Melisande Reule walks into his hotel bringing his wolf howling to the surface. He knows he has found his mate. But when she is targeted by a Russian assassin, Grigori must fight to keep her safe and at his side.