This book is part of a book series called Dk E. Guides .

This book has been graded for interest at 10-17 years.

There are 96 pages in this book. This book was published 2005 by DK Publishing (Dorling Kindersley) .

Chris Oxlade is an experienced writer of children's non-fiction and specialises in scientific subjects. John Farndon has written many books for children, specialising in popular science and astronomy. He has twice been shortlisted for the "Copus Science Book Prize. "