When Arthur's third-grade class goes hunting for fossils at Rainbow Rock State Park, his friend Buster actually finds one, and instead of turning it in Buster decides to take it home--but he soon regrets his decision.

The class goes fossil hunting in Rainbow Rock State Park, where Buster and Arthur the aardvark find a real fossil, which Buster is reluctant to give up. Can Arthur persuade him to return his important discovery, or will it remain hidden for years to come in Buster's bedroom?

The children of Gotham are on a field trip when they realize that the new dinosaur exhibit at the museum has been tampered with. It's up to Batman, Batgirl, Nightwing, and the children to solve the riddles, catch the culprit, and find the stolen bones in this exciting Level 2 reader.

It's the greatest discovery in dinosaur-hunting history, and Mike gets all the credit! But some discoveries are more dangerous than others, and once again he and Josh are deep in trouble.This time it will take all their skill, all their wit, and three spectacular dune buggies to solve the puzzle of the dinosaurs. But they'll need each other, the wisdom of their parents, and their faith in God to survive what they find!

When Arthur's third-grade class goes hunting for fossils at Rainbow Rock State Park, his friend Buster actually finds one, and instead of turning it in Buster decides to take it home--but he soon regrets his decision.