Ruth Mason doesn't know it yet, but there's an extraordinary secret hidden just beneath her feet.

The year is 1905, and Ruth is a prairie girl living in South Dakota. She has no way of guessing that millions of years ago, dinosaurs once lived in her own backyard.

Until one day, when Ruth starts finding clues: small pieces of the past, scattered across her land. They're dinosaur fossils—but she doesn't guess that yet either. It will take many years of collecting these clues, and many, many questions, but Ruth Mason is about to take part in one of the most exciting paleontological discoveries of our time.

From the dust jacket