Mary Anning, considered the world's greatest fossilist, discovered her first big find at the age of twelve. This novel is an imaginative re-creation of her childhood in early nineteenth-century Lyme Regis. Mary was born in 1799 in Lyme Regis, England, to a poor family. She and her older brother were the only two of ten children to survive. Her father, a carpenter and part-time fossil hunter, taught his children to look for fossils. When her father injured himself and was unable to work, Mary quit school and took up fossil hunting full-time to help support her family, a task that became even more important when her father died, leaving the Annings in debt. At the age of twelve, Mary, with her older brother Joe, found what they believed to be the skeleton of a gigantic crocodile, the Great Croc of the legends. Between dodging her rival fossil hunter, the Curiman, and the sheer work of carefully digging out the fossil, Mary took almost a year to excavate what would later be termed the Ichthyosaurus.

Mary Anning may have been uneducated, poor and a woman, but her life's work of fossil hunting led her to make many discoveries that influenced our understanding of prehistoric creatures and the age of the Earth. In 2010, Mary was named among the ten British women who have most influenced the history of science. Charles Darwin even cited Mary's fossilized creatures as evidence in his book On the Origin of Species. In this triumphant novel about scientific discovery, Monica Kulling brings Mary Anning and her world to life for young readers.