The Lost Symbol

In this novel, Robert Langdon is invited to give a lecture at the U.S.

Capitol, only to find himself embroiled in a mystery involving his kidnapped mentor, Peter Solomon.

Langdon must decipher ancient symbols and navigate a clandestine world of Masonic secrets to rescue Solomon and uncover the truth about the 'Lost Word' and the 'Mason's Pyramid.

' Along the way, he encounters various characters, including the enigmatic Mal'akh, who poses a significant threat, and Katherine Solomon, a noetic scientist and Peter's sister.

The story delves into themes of Freemasonry, ancient knowledge, and the tension between science and religion.