Brown's novels that feature the lead character Robert Langdon also include historical themes and Christianity as motifs, and as a result, have generated controversy. Brown states on his website that his books are not anti-Christian, though he is on a 'constant spiritual journey' himself, and says that his book The Da Vinci Code is simply "an entertaining story that promotes spiritual discussion and debate" and suggests that the book may be used "as a positive catalyst for introspection and exploration of our faith."
At 200 Million books sold, he is one of the highest selling authors of all time and with only six books, he has achieved these sales writing fewer books than anyone above him on the list.[2] The Robert Langdon series is currently the seventh highest selling series of all time.[3]