From rush hour on a busy city street to harvest time down on the farm, the Wheels at Work series provides a close-up look at the world of hardworking trucks, buses, ambulances, tractors, combines and more. With simple narrative sentences and vibrant, detailed artwork, these books put kids behind the wheels of some formidable machines. The vehicles they see every day --- in the city or in the country --- are brought to life on each appealing page.