“If the “Harry Potter” books stand as the essential popular read for young people, then “The Da Vinci Code” has captured the crown for grown-ups. A word-of-mouth sensation from the moment it came out, Brown’s controversial mix of storytelling and speculation remains high on best-seller lists even as it begins its third year since publication. Twenty-five million books, in 44 languages, are in print worldwide and no end is in sight. Booksellers expect “The Da Vinci Code” to remain a best-seller well into 2005.”