This book is part of a book series called In Focus .

This book has been graded for interest at 7-11 years.

There are 64 pages in this book. This book was published 2017 by Kingfisher .

Professor Charles Taylor received the U. K. 's Bragg Medal and Prize of Institutional Physics, and the UK's Michael Faraday Award for contributions to the public understanding of science. He has presented lectures on BBC television and has written many science books for children. Steve Parker is an experienced non-fiction children's writer who also wrote the Look at Your Body series.