Where on earth has Pippin's yellow sock with clocks gone? Pippin is determined to find out. Together with his friend Tog, they embark on the greatest sock hunt ever. Putting the world of lost socks to rights - and lefts - has never been such fun, especially if you work as a pair. This is a big adventure about one of life's little mysteries, bursting with colourful footwear for children to look for, count and match.