An angel called Peterbilt
(Book)

"Michael and Melanie Anderle are hauling a tanker full of oil with their Peterbilt eighteen-wheeler when they're struck by a temporal irregularity that sends them, the truck, and their daughter back in time a thousand years. The bubble that transports them also grabs a chemist and her two young children, along with half a convenience store in the middle of the United States. They just want to make a decent life for themselves in this new world of the past, with their Peterbilt and its oil providing a means of transportation, a generator, and shelter. But not all the locals are willing to live and let live, and when the area shamans decide that this community of temporally displaced persons is a threat to their power, the Anderles find out what it's like to take a Peterbilt to war"--,Provided by publisher.