J K Rowling has also written two small volumes, which appear as the titles of Harry's school books within the novels. "Fantastic Beasts and Where to Find Them" and "Quidditch Through The Ages" were published by Bloomsbury Children's Books and Scholastic in March 2001 in aid of Comic Relief. The Harry Potter books have sold 400 million copies worldwide. They are distributed in over 200 territories and are translated into 67 languages.