Launches – A Summer of Lost Symbols

In anticipation of the long-awaited publication of Dan Brown’s fifth novel, THE LOST SYMBOL, on September 15 of this year, Doubleday is pleased to announce the launch of a summer-long event featuring an enigmatic array of codes, cryptic trivia, puzzles, secret history, maps, aphorisms, ciphers, arcane knowledge, and more. Visit

There will be a number of focal points., now deceptively simple in appearance, will reveal more as the summer advances. There, you will also find links to the official Dan Brown Facebook page and to LOSTSYMBOLBOOK – the official Twitter page for the novel. Daily posts in both spaces will challenge, intrigue, educate and entertain!