Daniel Gerhard Brown is an American author best known for his thriller novels, including the
Robert Langdon novels
Angels & Demons (2000),
The Da Vinci Code (2003),
The Lost Symbol (2009),
Inferno (2013), and
Origin (2017). His novels are treasure hunts that usually take place over a period of 24 hours. They feature recurring themes of cryptography, art, and conspiracy theories. His books have been translated into 57 languages and, as of 2012, have sold over 200 million copies. Three of them,
Angels & Demons,
The Da Vinci Code, and
Inferno, have been adapted into films, while one of them,
The Lost Symbol, was adapted into a television show.