Dan Brown on December 7, 2009 in Milan, Italy (Vittorio Zunino Celotto/Getty Images)
NEW YORK (AP) - A new Dan Brown novel is coming in May. The title remains a puzzle.
Doubleday announced Tuesday that the author will again feature Harvard symbologist Robert Langdon, the protagonist for his blockbuster "The Da Vinci Code" and for the million-selling followup "The Lost Symbol." The story will be set in Europe as Langdon probes the "harrowing" world of a "mysterious" literary masterpiece. "The Da Vinci Code" was centered on a masterpiece of painting, the Mona Lisa.
The title was to be revealed later Tuesday, piece by piece, through a mosaic on Brown's website, www.danbrown.com .