The Lost Symbol is a 2009 novel written by American writer Dan Brown.
It is a thriller set in Washington, D.C., after the events of The Da Vinci Code,
and relies on Freemasonry for both its recurring theme and its major characters.
Published: September 15, 2009
Author: Dan Brown
Preceded by: The Da Vinci Code
Followed by: Inferno
Adaptations: The Lost Symbol
Characters: Robert Langdon, Mal'akh, Katherine Solomon, Peter Solomon, Isabel Solomon