1. The author of the Harry Potter books does not actually have a middle name
2. The 'K' in her pen name is in honour of her grandmother Kathleen
3. And because Rowling initially couldn't afford a computer (or typewriter) she wrote her very first Harry Potter book by hand
4. She has also written several mystery books under the pen name "Robert Galbraith"
5. Rowling was the first author in the world to reach billionaire status
6. And in honour of her late mother set up a charity called the Volant Charitable Trust
7. Rowling's birthday is 31st July 1965
8. She was born in Gloucestershire not far from the town of Dursley, which is the name she gave to Harry's Muggle aunt and uncle
9. She was a month away from her 32nd birthday when the first Harry Potter book was published in 1997
10. A hardback first edition of Harry Potter and the Philosopher's Stone (only 500 were printed) my be worth tens of thousands of pounds today depending on its condition