Supernatural and the children of Anubis book one.

Deanna and Samantha Winchester travel to Indiana, to investigate a murder that could be the work of a werewolf. But they soon discover that werewolves aren't the only thing going bump in the night. The town is also home to a pack of jakkals who worship the god Anubis: carrion - eating scavengers who hate werewolves. With the help of Garth, the Winchester sisters must stop the werewolf- jakkal turf war before it engulfs the town- and the god Anubis is awakened...