HARDtalk's Stephen Sackur speaks to Dan Brown about his new book, Origin. With his 2003 novel The Da Vinci Code, Brown, one of the top-selling authors of all time, challenged the story of Christianity and sparked outrage in the Vatican. Now, he's back with another epic tale, this time about man's quest to understand the beginnings of life on earth. Is there still public appetite for Brown's high-fibre blockbuster novels? Show less