This book is part of a book series called Dk First Reference .

This book has been graded for interest at 7-10 years.

There are 128 pages in this book. This is a reference book. This book was published 2004 by DK Publishing .

Anita Ganeri is an award-winning author of children's books, specializing in geography. Chris Oxlade is an experienced writer of children's non-fiction and specialises in scientific subjects.