This is the story of Alison Hubble Who 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.