The second exciting, mysterious, and very, very funny mystery of CECILY SAWYER, from the award-winning author of EINSTEIN THE PENGUIN.

Cecily Sawyer is surrounded by spies. They are everywhere – on the streets, at her home, at her school – and after intercepting an extremely suspicious message intended for her parents (also spies), Cecily, along with her clever pet rat, Mrs. Maple Syrup, decides to investigate.

And the more Cecily investigates, the deeper the mystery becomes… forcing her to wonder who – if anyone – she can truly trust.

Completely gripping, incredibly funny, and very original, and wonderfully illustrated by David Tazzyman, How to Crack a Code is an unmissable 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 secret agents vying for attention, the choice can seem daunting – but Cecily Sawyer: How to Be a Spy, a beautiful new adventure by Iona Rangeley, shows the secret formula working at its best… Rangeley is a clever, charming writer – and what follows is a properly plotted adventure, in which every element is part of a puzzle the reader can piece together as the narrative progresses.” – The Telegraph

“Very clever, absolutely funny, and full of charm.” – Laura Noakes, author of Cosima Unfortunate Steals a Star

“A fantastic book” – Zohra Nabi, author of The Kingdom over the Sea

“A charming and elegant corrective to the idea that 10-year-old girls and rats have no role in the field of espionage.” – Luke Jennings, author of Killing Eve

“I highly recommend this book. A very good start for those who want to enter the profession or just want a good read.” – Sir John Scarlett, former head of MI6 (really)