Readers devoured the "fact" page at the beginning of the book. Brown includes a disclaimer that "all descriptions of artwork, architecture, documents, and secret rituals in this novel are accurate." That blurring of reality and fiction is the crack cocaine of the thriller world.

: Explores the intersection of artificial intelligence, religion, and human origins.

: Set in Washington, D.C., this story explores the hidden history of the Freemasons and the "Ancient Mysteries". Inferno

: Langdon visits the Guggenheim Museum Bilbao for a breakthrough discovery that challenges the origins of human existence. The Secret of Secrets