This is volume 4 in Blackthorn Key .
This book has been graded for interest at 10-14 years.
There are 512 pages in this book. This book was published 2019 by Aladdin Paperbacks .
Since escaping from university with a pair of degrees in theoretical physics, Kevin Sands has worked as a researcher, a business consultant and a teacher. He lives in Toronto, Canada.
This book is in the following series: