This is the story of Alison HubbleWho went to bed single . . . And woke up double!A tale of MATHEMATICAL MAYHEM from magnificent illustrator Bruce Ingman and master storyteller Allan Ahlberg!Alison Hubble is shocked when she wakes up to find a twin in the bed next to her. And she keeps doubling . . . and doubling . . . and doubling!A fantastically funny and completely clever new picture book from the critically-acclaimed pair behind The Pencil and The Runaway Dinner.