Sprouting a tail and spikes over the summer before fifth grade, Sawyer, a boy with the dinosaur gene, is bullied in school, but when his tormentors begin to disappear, it is up to Sawyer, his best friend Elliot, and a mysterious new girl to rescue them from a galactically horrible fate.

Contains facts about the triceratops and the spinosaurus, comparing such aspects as their sizes, brain structure, and abilities, and describes what would happen if they had a fight.

"Full-color images and simple text introduce young readers to different plated dinosaurs, including their physical characteristics, habitats, and diets"--

Oona finds a giant egg and brings it back to West Wog to care for it, and see what hatches--but others in the cave want to claim her egg, particularly the nasty kid Bruce Brute, and when the baby stegosaurus hatches it will have to choose who it wants to live with.

"Baby Stegosaurus travels with the herd, munching on plants. When a volcano erupts, the dinosaurs run, but Baby Stegosaurus can't keep up and is swept downriver. It'll take luck (and some help from Mama) to bring the little dino back to the herd"--

With school out Oona and her brother Bonk are busy helping their father gather food, but Oona's pet Stegosaurus is something of a cave wrecker when left at home all day, so the children start Camp Woggle where all the local pets can amuse themselves during the day--but Mauro's pet T-Rex is a problem because he has a tendency want to eat the other campers.