Little Tug may not be very tall or very fast, but when the big ships in the harbor need help, they know they can count on him to be there with a push, a pull, and a ride to safety. But what happens when Little Tug gets tired? This simple, endearing book with a charming retro feel and an emotional punch is the first book for Roaring Brook Press by the acclaimed author of Polar Bear Night (New York Times Best Illustrated book) and Where's Walrus?