In the first part of the novel, we are introduced to the new characters (for this is part of a saga) and the magnificent scenery, Washington D.C. The beginning of the book pulls us into a world of intrigue and curiosity, setting the scene for what is about to happen: a vibrating, action-packed set of actions that evolve one into the next without giving us the time to breath, that is, to put down the book. Then, several adventures take place at the same time regarding the different characters in totally different places and fields of the story: science, hackers, the CIA and so on.
At the end of the novel when all the pressure has been released, this well-known and best-selling American writer tries to give unity and truthfulness to what has been explained through the book about the masons and the lost symbol not very convincingly from my point of view.
I enjoyed the reading even though I was a bit disappointed at the end, but there are two things I would like to point out from this book: the first one is its high filmability, that is, the capacity of this novel to be made into a film; and the second one is a quote about knowledge that I share with the author and hope my students will also share. It is on page 420 on my edition (Corgi Books, 2010) and says: "Knowledge grows exponentially. The more we know, the greater our ability to learn and the faster we expand our knowledge base".
To learn more about the symbology of the novel or what surrounds the book, you can have a look at Dan Brown's official site