Author: Rangeley, Iona
Interest age: from c 8 years
Published on 19 June 2025 by Harpercollins Publishers (HarperCollins) in the United Kingdom.
Paperback | 240 pages
128 x 198 x 19 | 214g
A thrilling, mysterious and very, very funny new adventure from the award-winning author of EINSTEIN THE PENGUIN, with brilliant illustrations from bestseller David Tazzyman.
Cecily Sawyer has spent the evening in the attic, training her pet mouse, Mrs Maple Syrup – an unusually intelligent mouse, in Cecily’s opinion – when her parents disappear.
Luckily, Cecily is more than ready to investigate such a thing. She has wanted to be a spy her whole life, and has all the spy handbooks, manuals and code-cracking kits a girl could need.
But soon, Cecily discovers several very strange things in her city. She’s not the only spy out there – far from it, in fact. And Mrs Maple Syrup is not the only unusually intelligent mouse…