Mrs Pepperpot and the Treasure by Alf Proysen
Mrs. Pepperpot has a problem - a huge problem - she shrinks! And when she shrinks she finds herself in all sorts of trouble. Poor Mrs. Pepperpot has shrunk again! Puss wants to show her some treasure in the neighbour's barn and they set off with Mrs. Pepperpot holding on tight to Puss's back. But it's not easy being tiny. Together they have to dodge angry magpies, snowballs and next door's dog. But when they reach the treasure it's all worth it!