Claimed by the Wolf: A Shadow Guardians Novel

They guard humanity against supernatural threats from the five gateways into the world. The Shadow Guardians: a vampire, a werewolf, a demon, a dragon and a fae are united in brotherhood— and war.
Shadow Guardian Kenrick is an alpha werewolf forever in his prime. When Sybil, a beautiful apprentice witch, unknowingly opens a realm to the Otherworld, there is a sudden influx of demons—and it's up to Kenrick to help her stop them. Soon their passion flares and Kenrick desires Sybil as his mate...