At last, a new Dan Brown novel is coming.

Six years after the release of his mega-selling The Da Vinci Code, the Knopf Doubleday Publishing Group announced that Brown’s The Lost Symbol, a thriller set during a 12-hour period and featuring Da Vinci Code protagonist Robert Langdon, will come out in September.

The first printing will be 5 million copies, Knopf Doubleday said yesterday, a modest number considering that The Da Vinci Code has sold more than 80 million worldwide.