Book 4 in the New York Timesbestselling series - perfect for curious readers!

'This book reminded me of some of the children's books I grew up with, like Charlie and the Chocolate Factory and The Phantom Tollbooth.' RICK RIORDAN, author of the PERCY JACKSONseries on book 1

'Like the Potter books, this story goes beyond mere adventure'BOOKLIST on book 1

After starring in three adventures, the inimitable quartet of Reynie, Sticky, Kate, and Constance haven't had a mission together in some time.

But with the arrival of a new Society member - and a new threat - they must reunite to face dilemmas more dangerous than ever before.

Including the return of the villainous Mr Curtain and his Ten Men, and a formidable enemy with a mystifying ability to track their every move ... 

• Book 4 in the New York Timesbestselling adventure series - ideal for children aged 10 and up
• Join a group of smart and resourceful junior sleuths as they solve a series of page-turning puzzles and mysteries
• Perfect for fans of Robin Stevens's MURDER MOST UNLADYLIKE series
• Want to know how it all began? Check out the prequel to the series, THE EXTRAORDINARY EDUCATION OF NICHOLAS BENEDICT