Lost Symbol - Lost?

Well finally completed reading Dan Brown's - Lost Symbol ( lost forever), I was quite a good start, but a lil dissapointing for when you hav read his previos novels. I do admire him the way he brought in different subjects into one dingle novel where there was spiritualism, technology and science. The intention of saying religion and science have same objective or rather they aim the same was fabulous, but as one reads on it gets draggy and boring. honestly o couldn't get what was lost and its significance until the last few pages. 500 pages could have been easily consised to 300 :D. Robert Langdon role could have been better. And best part is women in the book played a crucial role which really lifted me up :D.
Nothing can beat Dan Vinci code or Digital Fortress.
What do you say?

Fin ,
Prat