This is the tenth title in the Nate the Great series. When Oliver's beach bag disappears, Nate takes the case. With a little help from his trusty dog, Sludge, Nate gets going in the right direction.
From the front Cover
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!