Meet the men and women who drive concrete mixer trucks and deliver this essential substance to construction sites. Learn about the machinery that perfectly mixes rocky material, sand, cement, water, and other substances in the truck's giant drum. Discover how the concrete mixture is pumped from the truck to where it is needed on a construction site. Find out what it is like to be a concrete mixer driver and do this skilled and important job. Filled with behind-the-scenes photos, this book is a fascinating read for all truck fans and young readers who prefer factual books. It's also perfect for supporting social studies topics such as "The Jobs People Do" and "People in Our Communities Who Help Us."