Unquestionably Dan Brown is best known for his 2003 best-selling novel, The Da Vinci code.
The Da Vinci code, second in Brown's series about Robert Langdon, features religious symbolism, ancient beliefs, secret societies, contemporary political intrigue involving both religious and secular governments, and art.
If you enjoyed the combination of history and conspiracies (religious and otherwise) combined with the fast paced action of Dan Brown's books, consider these historical thrillers.
If you enjoyed the religous conspiracy aspect of Brown's Langdon books, but don't really care about the historical elements, take a look at these titles.
If you were interested by Brown's nontraditional presentation of the roles of women in the early Christian church, take a look at these novels and non-fiction texts. They address the role of women in the Christian church, then and now.