The Riddler has escaped! Now it’s up to Batman and Robin to track him down. But following the Prince of Puzzle’s clever clues leads the Dynamic Duo into the belly of a beast. Can they break free from their dino death-trap before it’s too late? Or will the Riddler snatch victory from the jaws of their defeat? Michael Dahl is the prolific author of the bestselling Goodnight, Baseball picture book and more than 200 other books for children and young adults. He has won the AEP Distinguished Achievement Award three times for his nonfiction, a Teacher's Choice award from Learning magazine, and a Seal of Excellence from the Creative Child Awards. Dahl currently lives in Minneapolis, Minnesota.