This book is part of a book series called Facts At Your Fingertips .

There are 64 pages in this book. This book was published by Brown Bear Books .

Andrew Campbell is an author and non-fiction children's editor, specialising in history and social issues. He studied at St Andrew's University in Scotland and now lives in London. DR AMY-JANE BEER is a writer, editor, journalist and scientist based in rural North Yorkshire. She has contributed to many books on natural history and writes regular features for magazines such as BBC Wildlife.