Chris Oxlade has contributed to over 70 books, including: The Usborne Illustrated Dictionary of Science (Usborne); Wheels, Wings and Water (Oxlade); DK PictureAtlas (Dorling Kindersley); Great Inventions That Shaped The World (Lorenz Books). Michael Harris has been writing and consulting on the subject of trains and railways for over 30 years, making him one of the leading experts in his field. Peter Harrison is the author of five children's books, one each on the painters van Gogh and Monet, the remainder on 'The Wild West', 'Inventions', and 'Cars'.