<p>When Arthur&#39;s third-grade class goes hunting for fossils at Rainbow Rock State Park Buster actually finds one. There&rsquo;s just one problem: he wants to keep it. Can Arthur persuade Buster to return the important discovery or will it stay buried forever in the back of Buster&rsquo;s closet?</p><p>In chapter-book format for children who are ready to read on their own this hilarious adventure will surely be a hit among Arthur fans.</p>