Code

I Finally picked up The Da Vinci Code from the library last night and started reading it. So far so good. I recognized the numbers that the murder victim wrote down as being [quasi-spoiler, if you're a nerd but haven't read the book yet] some of these, but I'm not sure why that's important yet.
I am a little thrown off by the whole idea if this being a fictional novel with lots of facts mixed in, because it's not always clear what exactly I'm supposed to believe. Opus Dei seems to be real though.