Jackpot: Book 10

When a warm March day beckons Aldo and his best friend, Jack, outdoors to their fort under the giant pine tree, stick-in-the-mud Aldo gets, well, stuck in the mud. As they dig Aldo’s sneakers out from the embankment, they unearth a humungous bone, which rock-hound Jack believes to be a dinosaur fossil from the Jurassic period.

Their hilarious quest to figure out the bone’s origin and value takes them to the nearby university, the local pawn shop, the famous dino dig site a few hours away, an...