Claim: Inferno (2016 film) is in the same series as Angels & Demons, the Robert Langdon film series.

Daniel Gerhard `` Dan '' Brown -LRB- born June 22 , 1964 -RRB- is an American author of thriller fiction who wrote the 2003 bestselling novel The Da Vinci Code . Brown 's novels are treasure hunts set in a 24-hour period , and feature the recurring themes of cryptography , keys , symbols , codes , and conspiracy theories . His books have been translated into 52 languages , and as of 2012 , sold over 200 million copies . Three of them , Angels & Demons -LRB- 2000 -RRB- , The Da Vinci Code -LRB- 2003 -RRB- , and Inferno -LRB- 2013 -RRB- , have been adapted into films .   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 . ''