Sometimes the most important journeys don’t take you farther away, they take you deeper. When Marvin the Mole sets out on a familiar road along historic Route 66, he expects another thoughtful adventure filled with discovery, history, and good company. What he doesn’t expect is to be drawn beneath the surface, into vast canyons, ancient caverns, and moments of stillness that challenge everything he thinks he knows about courage and direction. Joined by his spirited cousin Maxie, inventive Marcie, and the ever-steady Javelina Hank, Marvin travels from lively desert towns to the edge of the Grand Canyon itself. Along the way, they face mysteries, get turned around, test their trust in one another, and learn that not every challenge is meant to be rushed, or solved the same way. As the trail breaks and the ground grows quiet, Marvin’s Mole-Sense is tested like never before. To move forward, he must learn when to act, when to wait, and when to listen to what the earth has been saying all along. Marvin the Mole: The Tunnel Under the Rim a Route 66 Journey is a heartfelt adventure that blends humor, history, and reflection into a story about friendship, resilience, and the strength found in stillness. Perfect for readers who love meaningful journeys, memorable places, and characters who grow in ways that feel true. Because sometimes, the ground beneath you knows the way home.