Author: Stevens, Robin

Adventure stories (Children’s / Teenage)

Published on 11 September 2025 by Penguin Random House Children’s UK (Puffin) in the United Kingdom as part of ‘The Ministry of Unladylike Activity’ series.

Paperback | 432 pages
198 x 129 x 28 | 302g

‘Robin Stevens is Agatha Christie for children’ – Katherine RundellIts hard to know where to start. Theres so much to say about the murders, and the codes, and the spy, that Im getting tangled up in the story already…’It’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. Its 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 truthThe thrilling brand-new mystery from the million-copy-bestselling author of Murder Most Unladylike.

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