The only Dan Brown book I have ever read was called Digital Fortress and I thought it was a pretty fantastic book. I read it years before the whole Davinci Code fad became a thing. I am not sure what order he wrote or published those books. I have never seen the movies either. I think the whole controversy around the Catholic church that garnered so much attention is ultimately what made it undesirable for me to ever read the books or watch the movies. If you ever get a chance, you should check out Digital Fortress. I remember it being pretty decent.