Ace detective Laura Marlin returns in another gripping adventure mystery for World Book Day 2014, from award-winning author, Lauren St John.

When a prize-winning essay earns Laura Marlin an invitation to a midnight picnic on mysterious Bodmin Moor she can hardly wait, especially since her best friend, Tariq, and husky, Skye, get to come too.

But Bodmin is a place steeped in legend and as the fog descends it becomes hard to separate myth from reality. When a freak accident leaves the children alone, Laura has to use all her powers of deduction to outwit an enemy who may not even exist.

This book is part of a book series called Laura Marlin Mysteries .

This book has been graded for interest at 7-9 years.

There are 96 pages in this book. This book was published 2014 by Hachette Children's Group .

Lauren St John is one of the lead voices of Authors4 Oceans, a collective of 50 writers calling to ban the use of plastics in the book industry.