When nine-year-old Nicholas Benedict is sent to a new orphanage, he encounters vicious bullies, selfish adults, strange circumstances - and a mind-bending mystery. Luckily, he has one very important thing in his favour: he's a genius.

When an advert appears in the newspaper for children to take part in a secret mission, children everywhere sit a series of odd tests. In the end, just Reynie, Kate, Sticky and Constance succeed. They have three things in common: they are honest, talented and orphans. They must go undercover and work as a team to save themselves, but also the world.

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

This exclusive companion book to the bestselling Mysterious Benedict Society series is a mind-bending collection that will put YOU to the test! With full-color artwork throughout, this companion features ingenious new puzzles, riddles, and brainteasers compiled by Mr. Benedict himself, with the help of Reynie, Kate, Sticky, Constance, and other Society associates. Think you have what it takes to join the Mysterious Benedict Society? Open this book and find out!

When Reuben discovers an old pocket watch, he soon realizes it holds an incredible power: it can turn you invisible for fifteen minutes. And the watch's power is even more extraordinary than he knows. Soon, he's on the run from a despot determined to possess it for himself ...

It should have been a celebration party, but now it's another mind-bending mission for Reynie, Kate, Sticky and Constance. Join them as they race across the globe by train, ship and bicycle to save their beloved Mr Benedict!

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. The third book in the New York Times bestselling series