Why should I read the Da Vinci Code

Is it good? I heard it's like reading an novelised version of " National Treasure"

In an answer to your question, you should read the Da Vinci Code if you fulfil one or more of the following criteria:

You hate books with an original plot.
You hate books with multidimensional characters.
You love Marty Stus.
You are gullible, are easily excited by sensationalist crap, and really, really hate Christians.
You are easily excited by hype, in which case, please see above.
You have no taste in literature whatsoever and/or you hate the English language.
You believe that all books must read like a movie.