I recently read the book "Angels and Demons" and have read and seen "The DaVinci Code".
"Angels" was written before "DaVinci" and has a much wilder story, but has some
similarities, including the Catholic Church, European sites, and ancient cults.
At the beginning, the hero, who is the same guy in both books, flies on a spaceship
whose pilot plays country music.
The girl in "Angels" is much sexier than the one in "DaVinci".
And here's an odd item:
Both books have villians who were crippled by polio as children.