Finders Keepers: A Jane Barnaby Adventure

All archaeology student Jane Barnaby had to do was deliver a box of pottery shards to her professor at his dig site, along with his new car. Yes, his office was in Oxfordshire, and his dig site was in Spain, a trip of 1,400 miles across three countries and two bodies of water. Still, it should have been simple.
That is, until everything went wrong.
Now, Jane has the wrong box and is being chased by thieves who want it and aren't particular about how they get what they want.
Add to that, she's picked up a pair of passengers who both claim they can help her get her professor's pottery back and return the artifacts to their rightful owner. If only she knew who was working with the thieves and who she can trust in this high-stakes game of finders keepers.