This is volume 6 in Countdown .

This book has been graded for interest at 12+ years.

There are 144 pages in this book. This book was published 2016 by Spul - Simon Pulse .

The author, Steve Parker, has written numerous books on the human body, animals and wildlife. Steve graduated with a BSc First Class Honours, is a Scientific Fellow of the Zoological Society, and appears on radio, TV and at science workshops, schools and book fairs. The consultant, Dr Trish Groves, is a medical writer and a senior editor at the British Medical Journal.