for The Mammoth Academy by Neal Layton
From the Publisher
Oscar and his sister, Arabella, are starting their first year at the Mammoth Academy. Oscar isn't fond of schoolwork, but he loves learning outdoor sports and becoming best friends with Fox. Things are going wonderfully, until the cook's oranges are stolen and Oscar spots some MYSTERIOUS TRACKS.
Whatever made the MYSTERIOUS TRACKS has only two feet. Could it be those wild and dangerous animals called humans?
Publisher description retrieved from Google Books.