When were the first trains built and how did they work? Who organizes how trains move along the tracks? How do some trains go unphill? In this book, you'll find the answers and lots more fascinating facts about trains. Trains is part of an exciting series of books with easy reading text. Trains travel along railway tracks, taking people and all kinds of things from one place to another. Passenger trains carry people. They are made up of coaches that are linked by couplings. Freight trains pull wagons that carry goods. Large objects, such as cars, are loaded onto flat wagons. A railway track is made up of metal rails fastened to blocks, called sleepers.