From the creators of Red Truck, Yellow Copter, and Blue Boat comes a delightful new story about a helpful tractor getting ready for Harvest Day just in time for fall!It's Harvest Day at the farm, but before the kids arrive Green Tractor has to help their farmer friend get everything ready. They have to move big boulders using the hayfork and plow the land for the pumpkin races. And when the kids get there, it's time for Green Tractor to shine by pulling the wagon for the hayride!Kersten Hamilton and Valeria Patrone are back to add a new color and friendly helper vehicle to their beloved book series.