The third thrilling adventure in the new World War Two mystery series from the million-copy-bestselling author of Murder Most Unladylike.'Robin Stevens is Agatha Christie for children' - Katherine RundellIt's December 1941, and almost Christmas, when a bomb falls on Deepdean School for Girls. May and Nuala are whisked away from the chaos and sent to stay with May's big sister, Hazel Wong, who is working at Bletchley Park.Within seconds, they're thrown straight into their most dangerous case yet. A codebreaker has been shot in what appears to be a tragic accident - until a suspicious and top-secret message is discovered in his pocket. Was he a spy, working for the other side? Was the message planted on him? Most importantly - was this murder?Worst of all, Daisy's big brother, Bertie Wells, is being blamed. It’s up to May, Nuala and their friend Eric to prove Bertie's innocence and solve the mystery. But Bletchley is a strange and secretive place, full of Britain's most ingenious minds. They'll need to watch, listen, and puzzle out the incredible, unthinkable truth…Praise for Robin Stevens:'Absolutely thrilling' Louie Stowell'Superb' Observer'Funny, clever and warm . . . Such a delight' Louise O'Neill'Jolly gripping stuff' The Times'Spirited and fun . . . A must for young murder mystery fans' Bookseller'Triumphant . . . Deserves to be read for years to come' Guardian

The third thrilling adventure in the new World War Two mystery series from the million-copy-bestselling author of Murder Most Unladylike.'Robin Stevens is Agatha Christie for children' - Katherine RundellIt's December 1941, and almost Christmas, when a bomb falls on Deepdean School for Girls. May and Nuala are whisked away from the chaos and sent to stay with May's big sister, Hazel Wong, who is working at Bletchley Park.Within seconds, they're thrown straight into their most dangerous case yet. A codebreaker has been shot in what appears to be a tragic accident - until a suspicious and top-secret message is discovered in his pocket. Was he a spy, working for the other side? Was the message planted on him? Most importantly - was this murder?Worst of all, Daisy's big brother, Bertie Wells, is being blamed. It’s up to May, Nuala and their friend Eric to prove Bertie's innocence and solve the mystery. But Bletchley is a strange and secretive place, full of Britain's most ingenious minds. They'll need to watch, listen, and puzzle out the incredible, unthinkable truth…Praise for Robin Stevens:'Absolutely thrilling' Louie Stowell'Superb' Observer'Funny, clever and warm . . . Such a delight' Louise O'Neill'Jolly gripping stuff' The Times'Spirited and fun . . . A must for young murder mystery fans' Bookseller'Triumphant . . . Deserves to be read for years to come' Guardian