The Lost Symbol
by Dan Brown
I really enjoy Dan Brown's style of writing and I find the subject of his books fascinating. I think the history intriguing and the hunt for clues and symbols thoroughly engrossing.
That being said, this was not my favorite book of his. It was slow moving and for me a little anticlimactic. I still really liked the history and Langdon's attempt to figure out the symbols that will help save his friend's life.
My favorite of his books is still Angels & Demons and if you haven't read any of Brown's books before I would recommend reading it before you try The Lost Symbol.