They've won several awards, and they've also sold over 400 million copies.
I'm actually a fan of her poetry more then her Harry potter books even if  they did sell more then 400 Million copies.
I really like Harry Potter books, I have read them all. That's nice. Did you know they were written by J. K. Rowling? Yes, she is such a great writer. The books are awesome.
The books have won multiple awards, and sold more than 400 million copies.