Part of a new series for young children which examines different machines, these books take a "day in the life of" format.

Through simple text and colourful drawings, they show how each machine is used.

This book is about a tugboat. Other titles in this series include "The Story of a Jumbo Jet","The Story of a Helicopter", "The Story of a Digger", "The Story of a Truck" and "The Story of a Tractor".

Angela Royston is also author of the "Animal Life Stories" and "Farm Animal Stories" series.