This books is about the discovery of a prehistoric cave in France on the eve of World War II. Although it is told like a story, the characters and stories are true. Why this is shelved in my library's fiction section is beyond. This title would be perfect for "informational texts" or non-fiction books that read like fiction to satisfy NYC's Common Core Non-Fic Curriculum requirements. My 8 year old daughter read about half of it with a friend and they were intrigued. I don't think they would have picked the title out on their own, but it was good that they weren't bored once they began reading it.