But he hasn't finished it yet, apparently. And his publisher and the book chains see no hope for themselves without a new Dan Brown (or a J.K. Rowling, for that matter) mega-seller to save them from certain doom. It seems that Doubleday can wait no longer, and announced that it is laying off 10% of its workforce.
Doubleday spokesman David Drake said in the NY Times,
...the decision was not related to the delay in the delivery of the next novel by Dan Brown, the author of The Da Vinci Code, the blockbuster best seller published in 2003. Back in 2004, Doubleday said the target release date for the next book was 2005, but Mr. Brown has yet to deliver a manuscript. Sales from even a single title — if it is as significant as The Da Vinci Code — can make a substantial difference to a publisher’s sales.
Nevertheless, "the changes we've made are quite separate from anything to do with Dan Brown," Mr. Drake said.
No pressure there, Mr. Brown. Really. None at all. But in the meantime, somebody better hide the razor blades and barbiturates in the Doubleday executive washroom.