Gruffalo team on their monster success
16 July 2014 Last updated at 12:12 BST
There are not many partnerships that last for more than 20 years, but for author Julia Donaldson and illustrator Axel Scheffler, they have seen their work going from strength to strength.
The writer and illustrator behind children's books like The Gruffalo and Room on the Broom have had a two year break from working together, but now they are back with the story of the Scarecrows' Wedding.
Scheffler and Donaldson joined BBC Breakfast to talk about their collaborations and why the Gruffalo appears in every book.