. . "A mortally wounded man confides his last message to Is Twite, begging Is to continue the search for his missing son. Is soon discovers that hundreds of children are missing, including the heir to the throne. Where have they gone? Who is enticing them away?"@en . "Fiction"@en . "Fiction" . . . . . . . "Is" . "Is underground"@en . "Is"@en . . . . . "Bound to keep a promise to her dead uncle, Is travels to the mysterious north country to find two missing boys, one of them a prince, and to discover why so many children in London are disappearing."@en . . . . . . . . . . "Juvenile works"@en . "England" . .