The fourth in the globe-trotting adventure series where dinosaurs have evolved - into Supersaurs. A Mexican Day of the Dead festival has secrets to reveal ...

Bea Kingsley, her brother Carter and his pet tyrant, Buster, have all been happily living at the Kingsley ranch with their aunt and uncle, and godfather Theodore, in America for months. But the secrets of their father's journals and the mysterious Saurmen will not leave Bea's mind. Why did her father think it so important, and what is the connection between Theodore, Carter and the Saurmen. The clues lead to Mexico, and the search for answers in a lost city. What are the secrets of the saurs ... and can the children seek them out before the villainous Viscount and his henchman Hayter get there first?