The 500 pages were as exiting to read as I am used to by his other books. The Harward professor Robert Langdon is this time in Washington D.C. trying to help his hijacked mentor and friend by decrypting old freemasonary signs. He gets help from the sister of his friend and the CIA.
The only deficit in the book is: Some turns in the action of the book are predictable. Nevertheless Brown again did a really good job in writing.
As with Angels & Demons and The Da Vinci Code there will be a movie with Tom Hanks as Robert Langdon. It has been announced for 2012