Sky Wolves by Livi Michael
The wolf was enormous. Its ravenous jaws were open wide, its eyes glared fire.
When Sam's aunt rescues a lost dog, Sam knows that something incredible is going to happen. Jenny the Jack Russell may be a stray, but she is no ordinary dog. Jenny is more special than Sam could ever imagine...
But Jenny is in danger, and now Sam, Jenny and a gang of fellow runaways face an extraordinary journey. The sky wolves are on their trail, and they won't stop until the rest of the world is destroyed.
A gorgeously written, mystical adventure that will appeal to fantasy and animal fans alike from 9 years upwards.