The Great Mouse Plot by Roald Dahl

Every day THE BOY (none other than the young Roald Dahl, of course!) and his friends visit a sweet-shop to buy delicious gobstoppers and sticky treacle toffee. But there is one terrible problem. The shop is owned by a disgusting old hag who hates children. She is so mean they long to teach her a lesson. That’s when THE BOY finds the dead mouse and comes up with the perfect plan…