
Cecily Sawyer: How to Crack a Code
Iona Rangeley(Author)
HarperCollins (Publisher)
Will be published approx. on 18. June 2026
Book
Paperback/Softback
240 pages
978-0-00-864448-2 (ISBN)
Description
The second thrilling, mysterious and very, very funny CECILY SAWYER mystery, from the award-winning author of EINSTEIN THE PENGUIN.?
Cecily Sawyer is surrounded by spies. They're everywhere - on the streets, in her home, at her school - and after intercepting a highly suspicious message intended for her parents (also spies), Cecily, along with her highly-intelligent pet mouse, Mrs Maple Syrup, decides to investigate.?
And the more that Cecily digs, the further the mystery deepens ... forcing her to question who - if anyone - she can really trust.
Hugely gripping, incredibly funny, and highly original, and brilliantly illustrated throughout by David Tazzyman, How to Crack a Code is an unputdownable mystery - perfect for fans of Robin Stevens and Katherine Woodfine.
Also available in the series:
Cecily Sawyer: How to be a Spy
Praise for Cecily Sawyer: How to be a Spy:
'With so many undercover agents vying for attention, the choice can seem daunting - but Cecily Sawyer: How to Be a Spy, a delightful new adventure by Iona Rangeley, shows the detective formula working at its best ... Rangeley is a witty, beguiling writer - and what follows is a neatly plotted adventure, in which each clue forms part of a puzzle which the reader can piece together as the narrative rips along.' - The Telegraph
'Whip smart, absolutely hilarious and full of charm.' - Laura Noakes, author of Cosima Unfortunate Steals a Star
'A fabulous book' - Zohra Nabi, author of The Kingdom over the Sea
'A charming and elegant corrective to the notion that 10 year-old girls and mice have no role to play in espionage.' - Luke Jennings, author of Killing Eve
'I firmly recommend this book. A very good start for those who want to join the profession or who just want a good read.' - Sir John Scarlett, former Chief of MI6 (really)
Cecily Sawyer is surrounded by spies. They're everywhere - on the streets, in her home, at her school - and after intercepting a highly suspicious message intended for her parents (also spies), Cecily, along with her highly-intelligent pet mouse, Mrs Maple Syrup, decides to investigate.?
And the more that Cecily digs, the further the mystery deepens ... forcing her to question who - if anyone - she can really trust.
Hugely gripping, incredibly funny, and highly original, and brilliantly illustrated throughout by David Tazzyman, How to Crack a Code is an unputdownable mystery - perfect for fans of Robin Stevens and Katherine Woodfine.
Also available in the series:
Cecily Sawyer: How to be a Spy
Praise for Cecily Sawyer: How to be a Spy:
'With so many undercover agents vying for attention, the choice can seem daunting - but Cecily Sawyer: How to Be a Spy, a delightful new adventure by Iona Rangeley, shows the detective formula working at its best ... Rangeley is a witty, beguiling writer - and what follows is a neatly plotted adventure, in which each clue forms part of a puzzle which the reader can piece together as the narrative rips along.' - The Telegraph
'Whip smart, absolutely hilarious and full of charm.' - Laura Noakes, author of Cosima Unfortunate Steals a Star
'A fabulous book' - Zohra Nabi, author of The Kingdom over the Sea
'A charming and elegant corrective to the notion that 10 year-old girls and mice have no role to play in espionage.' - Luke Jennings, author of Killing Eve
'I firmly recommend this book. A very good start for those who want to join the profession or who just want a good read.' - Sir John Scarlett, former Chief of MI6 (really)
More details
Series
Language
English
Place of publication
London
United Kingdom
Publishing group
HarperCollins Publishers
Target group
Children/juvenile
Interest Age: From 9 to 12 years
Product notice
Unsewn / adhesive bound
Paperback (UK-B)
Dimensions
Height: 198 mm
Width: 129 mm
Thickness: 21 mm
Weight
270 gr
ISBN-13
978-0-00-864448-2 (9780008644482)
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited or by the publishers or by their respective licensors: all rights reserved.
Schweitzer Classification
Other editions
Additional editions

Iona Rangeley
Cecily Sawyer: How to Crack a Code
E-Book
approx. 06/2026
HarperCollins
€8.49
Not yet available
Persons
Iona Rangeley grew up in Norfolk and studied English at Oxford, where she developed a love of children's books. She has wanted to be a writer since her debut novel, Sam and the Pig, which she wrote when she was five.