Cecily Sawyer is up in the attic training her very clever pet mouse, Mrs Maple-Syrup, when her parents vanish. Luckily Cecily has always wanted to be a spy and owns every spy handbook and code-cracking kit going. But as she investigates she finds she's far from the only spy in the city, and Mrs Maple-Syrup isn't the only unusually intelligent mouse. A funny, mysterious adventure for readers aged 7+ from the author of Einstein the Penguin.
