Book 3 in the New York Times bestselling series! '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 JACKSON series on book 1 Reynie, Kate, Sticky and Constance are back - but so is Mr Curtain, with another devious scheme! Can the Mysterious Benedict Society thwart Mr Curtain's plans, even whilst held prisoner? Join them on their adventure as they face all sorts of dilemmas, in a bid to save Stonetown ...