The book is entertainment. I read it months back because a friend said that it was a good read. It is a fun read, sort of the way the Indiana Jones movie about the Tabernacle was a fun movie. Doesn't mean I believed it. I think the issue with the "Da Vinci Code" is being blown out of proportion. I can't see that making a movie of it is a big deal. But that's just my opinion.
I read the book, and found it to be poorly written with a juvenile plot line, poorly developed characters and frankly boring. I couldn't read more than four or five pages without falling asleep. The idea that DaVinci's mirror writing was a secret code is laughable. I can remember reading about the mirror writing in the Scholastic Journal, years ago, while waiting in the Doctor's office with my kids. I think that it's actually scary to think that so many Americans think that this is a well written book.