Andy Griffiths is the most popular children's author in Australia. He has written more than 25 books, including nonsense verse, short stories, comic novels and plays. His books have been New York Times bestsellers, won more than 50 children's choice awards, been adapted as a television cartoon series and sold more than five million copies worldwide. He is best known as the author of the JUST! series, The Day My Bum Went Psycho and the bestselling Treehouse series.