Everyone's favorite school mice are back for a prehistoric mystery! A hilarious, full-color chapter-book adventure packed with action, laughs, and dino-sized surprises—perfect for emerging readers.

In their third hilarious adventure, Tuck and Tina return just as the Boone School faces its biggest threat yet. Water fountains are erupting, crickets are swarming the classrooms, and the school board is ready to shut things down for good.

But the mice suspect something bigger: a masked troublemaker is after the dinosaur fossils buried beneath the school. From a kidnapped principal to a runaway bear to a high-flying model-airplane chase, this mystery is packed with twists, teamwork, and action.

• Book 3 in the full-color Tuck and Tina chapter-book series
• A gentle on-ramp from picture books to longer reads
• Hand-drawn art by Grossology illustrator Jack Keely
• From a co-creator of Diary of a Wimpy Kid and Poptropica

“Meet Tuck and Tina—your new best friends! Heartwarming and hilarious!” —Jeff Kinney, author of Diary of a Wimpy Kid

Join the tiniest heroes for their biggest, dino-sized case yet!