Jamie has just moved to Ammonite Bay, a stretch of coastline famous for its fossils. Jamie is a member of the Dinosaur Club--a network of kids around the world who love all things prehistoric. Jamie takes his tablet everywhere just in case he needs to contact the Club.

Jamie is exploring Ammonite Bay when he meets Tess, a member of Dinosaur Club who lives in Ammonite Bay too. Tess shows Jamie her favorite place--a secret cave with fossils all over the walls. They go through a tunnel at the back and discover some dinosaur footprints. When they walk along them, the two new friends find themselves back in the time of the dinosaurs! It's amazing, but dangerous, too--they'll need help from Dinosaur Club...

In this fun, action-packed adventure, Jamie, and Tess go face to face with the sturdy Ankylosaurus (ANK-ill-oh-SORE-us)--a herbivore that was built like a tank, and could fight like one, too!