The Invincibles: The Piglet Pickle - Caryl Hart - Bog

Troublesome twosome Nell and Freddie go on a school trip to a farm, where they pet the animals and learn about how they live, and Freddie smuggles a piglet out in his backpack. He thinks he's saving it from becoming sausages. So Nell keeps it in her bedroom, gives it a bath and gets it involved in bringing a local crime wave to an end!