Like many adventures, this one begins with a holiday in Cornwall, the discovery of an ancient map and a search for an Arthurian treasure. But Simon, Jane and Barney soon realize that dark forces are at work to prevent them releasing King Arthur's power for good once more.

Reviewer: Shubham

'I think this book is just fantastic! The way Susan has made this book a page turning reading. There is suspense and action in this book. This book is just so good. I recommend everyone to read this book as soon as possible. Also to read the whole series.'