Young reporter-in-training Kate and her mouse-accomplice Rupert are on board a train, off to visit Kate’s mum in the Arctic. But as soon as the train departs, mysterious things start happening…

A packet of ginger nuts goes missing…

A collection of gymnastics trophies are stolen…

And some ancient scrolls disappear…

Fellow passenger Madame Maude seems the most likely culprit, until a surprising – and delicious – twist turns the whole investigation on its head.

The first in a witty two-colour chapter-book series about a bold young detective and a colourful cast of suspects, in a setting worthy of Agatha Christie.