Simon was inspired to write by Anthony Trollope. She began to write children's books full-time in 1989. Simon is one of the UK's best-selling children's writers; she has published over 50 different books, including her most popular series Horrid Henry series, which has sold over 25 million copies, and has been translated into 24 languages.
Simon was inspired to write by Anthony Trollope. She began to write children's books full-time in 1989. Simon is one of the UK's best-selling children's writers; she has published over 50 different books, including her most popular series Horrid Henry series, which has sold over 25 million copies, and has been translated into 24 languages.