Yearling Books Nate the Great and the Boring Beach Bag

It's gone! Oliver's boring blue beach bag is gone. Inside are his clothes, shoes, and a special seashell. All he has left is his beach ball. This is a perfect case for Nate the Great and his trusty dog Sludge. But they don't find many clues in the sand and surf. What trail should they follow next? Follow the leader to find out!