The bestseller by Eva Ibbotson in paperback! At the long-closed platform 13 of King's Cross, there is a bustling activity every nine years. Only then does the secret door of the Gügel open, revealing a tunnel that leads to a completely different world - to an island so enchanting that you never want to leave. But one day, something terrible happens: the young prince of the island kingdom is kidnapped during a Gügel opening in London. It is not until nine years later that four chosen saviors can set out to bring the prince back. However, the four envoys have only nine days for their difficult task. A race against time begins...