DaVinci Code was good, it's predecessor Angels and Demons, ws a little better IMHO, the facts, symbology,divine proportion,etc. are much more interesting than the stories, both by Dan Brown.
Greg Iles,.Nelson Demille, James Patterson are also pretty good.
I also like the John Sanford "Prey Novels", light easy read.
the symbology and facts, historical and scientific are pretty interesting and eye opening in Browns 2 books
raz