Paul returns home from school one day to discover a tiny ghost is living in the keyhole of his front door. He names him Zippel, and the little ghost is curious about everything, from food and clothes to how the toilet flushes! But Paul's parents want to change the locks - can Paul find Zippel a new home in time? A charming story about finding friends in the most unexpected of places.7+ Filled with colourful pictures from best-loved illustrator Axel Scheffler.