"Geronimo Stilton's ancient ancestor Geronimo Stiltonut is back in another prehistoric adventure! It's the annual cavemouse sports competition! This year, Tiger Khan and his saber-toothed henchmen want to enter the games. They call a truce with the cavemice during the tournament...but when their flag goes missing, Tiger Khan is furious. Can Geronimo Stiltonut track it down in time to keep his fur intact?"--From publisher's web site. Presented in Spanish.

Translation of: Per mille ossicini, vai col brontosauro!