Jacqueline Wilson is the most popular author in British libraries in the whole of the last decade.
More of her books have been borrowed than anyone else's - including adult fiction authors.
Her books were lent 16 million times by British libraries in the last ten years - that's nearly 5,000 times a day!
She's a hugely popular author, selling more than 20 million books in the UK and her stories have been translated into 34 languages.
Jacqueline Wilson's honours
Jacqueline Wilson was honoured by the Queen when she was made a Dame in 2008 for services to writing..
Jacqueline Wilson meeting the Queen
Lots of her books, including The Story of Tracy Beaker and The Illustrated Mum, have been made into TV shows.
And from 2005 to 2007 she was the Children's Laureate, which is a position given to important kids' authors.