Andy Griffiths is one of the most popular children's authors in Australia. He has written 33 books, including nonsense verse, short stories, comic novels and plays. His books have been New York Times bestsellers, won 80 children's choice awards, been adapted as a television cartoon series and sold more than 12 million copies in Australia. He is best known as the author of the JUST! series, The Day My Bum Went Psycho and the bestselling Treehouse series.