Is there still public appetite for Dan Brown’s high fibre blockbuster novels? He’s one of the biggest selling authors of all time. His 2003 novel The Da Vinci Code 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. Stephen Sackur speaks to Dan Brown about his new book - Origin.(Photo: American author Dan Brown during a press conference at the 2017 Frankfurt Book Fair. Credit: Hannelore Foerster/Getty Images)