[frui]

Hi, everyone. I wake up to be thrilled by so many responses. Thank you for the recommendations. I will give some of them a try.
Now I found my title a bit misleading. I should have made it more precise. Say I am looking for something more Dan Brownish, or with Dan Brown characteristics, or just having the feel of Dan Brown. I don't know how to make myself more clear. I am not talking about religious themes, totems, symbols, or cryptology. I understand most people would see Dan Brown's fictions as being fully made up of such kind of devices. But for me they are not the deciding factors that make him stand out.
Ahi mentioned Eco. I read his works. They have similar religious themes as Da Vinci Code, but they are completely non-Dan Brown. Very different. Very very different. Eco is a great scholar, but his fictons are not thrillers, not even close.