This is one of a new series of books, ''Read and Discover'', designed to encourage children to learn about the world as they learn to read. Follow the twists and turns of the river's story - downhill, through fields and into the city. Where will it end? Non-fiction readers with boy and reluctant reader appeal. It includes text and illustrations, which support children learning to read. It features extra fact sections at the back of the books as well as author and illustrator biographies and index.