Josie crouched to examine the small cave-like crevice. Suddenly her hand slipped and she found herself wrist-deep in icy water. By her feet was a small tidal pool. Pieces of broken rock were scattered over the bottom of the pool. Her eyes were drawn to one of them. She scooped it out. What she saw made her gasp in amazed delight. On the rock were tiny raised prints. They looked like ... Josie held her breath. But could they be? Her eyes jumped back to the crystal clear water. There were more prints on the rocky bottom of the pool. Josie is fascinated with the secrets of the prehistoric world. She and her grandfather, an amateur paleontologist, explore the beaches and cliffs near Stone Trees Cottage in Nova Scotia. Tiny bones have been discovered, but what are they from? As Josie searches for the answer, she is forced to cope with an accident and competition from an unpleasant neighbor. Time is of the essence, for she must find the answer before someone else does and before the tides and waves that exposed the secret wash it away forever. Marilyn Helmer has a long-standing interest in dinosaurs. Her son studied paleontology and geology in university. On holidays, the family often included fossil hunting and beachcombing in their plans. Marilyn is the author of many other books for children, including Fog Cat (Kids Can, 1998), winner of the I.O.D.E. Book Award and Mr. Christie's Book Award.