Joe is nervous about his first big party, and as Mum walks him along the darkening street to his friend's house, his imagination starts to run wild. They search for the right place, looking through the windows, wondering "What if...?" while making surprising discoveries along the way.

Anthony Browne is the acclaimed author and illustrator of such prize-winning bestsellers as Gorilla (winner of the Kate Greenaway Medal and the Kurt Maschler Award), Willy the Wizard, My Dad, Voices in the Park (winner of Kurt Maschler Award) and Zoo (winner of the Kate Greenaway Medal).

In 2009, Anthony was appointed Children's Laureate, in recognition of his outstanding contribution to the world of picture books. Anthony was also the first British winner of the Hans Christian Andersen Award, one of the highest international honours for illustration. His work has been widely exhibited and his books are published all over the world.