Dan Brown clearly enjoys playing with legends, history, symbols and secrets. And readers' minds. In his best-selling novel, The Da Vinci Code, Brown wove all these - real and imagined - into a breathless mystery about Christianity, Mary Magdalene and the Divine Feminine that has spawned an industry of de-coders eager to separate fact from fiction. Now that he has turned his attention to the mysteries of Freemasonry, the centuries-old fraternal order, the new book also might deal with Mormonism. But rather than announce the Da Vinci sequel in a news release, Brown embedded tantalizing clues to its subject...