Clive Gifford is an award-winning author of more than fifty books on a wide variety of subjects. His previous Kingfisher titles include The Kingfisher Soccer Encyclopedia, The Atlas of Firsts, and 10 Leaders Who Changed the World. He is also co-author of Kingfisher's Explore science and social studies encyclopedia.
Peter Bull has worked as a freelance illustrator for more than twenty-five years. He creates both traditional and digital art for publishers worldwide and also runs the Peter Bull Art Studio, based in the UK.