Dinosaur Rescue: T-Wreck-Asaurus by Kyle Mewburn (author) (US edition)

A caveboy who is too smart for his tribe meets a dinosaur too smart for extinction. First in an awesomely funny series for all you dino-lovers. Arg is the only evolved boy in his Neanderthal cave tribe, and he just doesn’t fit in. His mum is baffled by his desire to wear clothes. His big sister is sick of his cleverness. His dad secretly wishes he could be more like a normal caveboy. But then Arg meets Skeet, an equally evolved talking T-Rex. Together, they set off on a BIG mission: to save the other dinosaurs from becoming extinct.