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

There are 80 pages in this book. This is a chapter book. Publishers market early chapter books at readers aged 6-10 years. This book was published 2017 by Random House Books for Young Readers .

The book will be compiled by the Puffin team in association with celebrity supporters of the charity. KATHLEEN WEIDNER ZOEHFELD has been a children's books editor and writer for thirty years and have always kept one eye on curriculum needs, especially in science. She has written other books in the National Geographic Kids Readers series including, Dinosaurs and Rocks and Minerals .