By Trenton Lee Stewart, Author & Diana Sudyka, Illustrator. 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! For ages 8 and up.