The Bletchley Riddle

A thrilling middle grade historical adventure from bestselling authors Ruta Sepetys and Steve Sheinkin Shortlisted for the Young Quills Award for Historical Fiction 2025 Remember, you are bound by the official secrets act... It is the summer of 1940. The world is at war. These days, you don't know who you can trust or who might be a secret spy… Maths whizz Jakob Novis has been recruited to the secret codebreaking centre at Bletchley Park. As Jakob works to crack the Nazi's Enigma cipher, his younger sister Lizzie is busy on an undercover mission of her own: to find their mother. Filled with codes to decipher and mysteries to unravel, this is the unputdownable historical adventure that will have you on the edge of your seats. 'A thrilling World War II code-breaking adventure filled with ciphers, secrets, and spies.' Alan Gratz, New York Times bestselling author of Refugee 'Exquisite historical storytelling! I only wish I could read it again for the very first time.' Jennifer A. Nielsen, #1 New York Times Bestselling author of Iceberg

Ruta Sepetys is a New York Times and internationally bestselling historical fiction writer and winner of the Carnegie Medal in 2017 and the Carnegie Shadower's Choice Award in 2023. Follow her on Instagram @RutaSepetysAuthor. Steve Sheinkin is a New York Times bestselling author of both fiction and non-fiction as well as a National Book Awards finalist and winner of multiple awards including the Newbery Honor.