The Solomon Key is the working title of an unreleased novel in progress by American author Dan Brown. The Solomon Key will be the third book involving the character of the Harvard professor Robert Langdon, of which the first two were Angels & Demons (2000) and The Da Vinci Code (2003). According to early reports, the book's story will take place in the Washington, D.C. area, and focus on the work of the Freemasons. The book has been in development for several years and the projected publication date has been pushed back multiple times. As of early 2009, no firm release date has been announced. On February 12, 2009, Ron Howard reported to ETonline from the movie set of Angels and Demons that Brown had completed The Solomon Key.

From the #1 New York Times bestselling author of The Da Vinci Code comes the explosive thriller that started it all. An ancient secret brotherhood. A devastating new weapon of destruction. An unthinkable target. When world-renowned Harvard symbologist Robert Langdon is summoned to his first assignment to a Swiss research facility to analyze a mysterious symbol -- seared into the chest of a murdered physicist -- he discovers evidence of the unimaginable: the resurgence of an ancient secret brotherhood known as the Illuminati...the most powerful underground organization ever to walk the earth. The Illuminati has now surfaced to carry out the final phase of its legendary vendetta against its most hated enemy -- the Catholic Church. Langdon's worst fears are confirmed on the eve of the Vatican's holy conclave, when a messenger of the Illuminati announces they have hidden an unstoppable time bomb at the very heart of Vatican City. With the countdown under way, Langdon jets to Rome to join forces with Vittoria Vetra, a beautiful and mysterious Italian scientist, to assist the Vatican in a desperate bid for survival. Embarking on a frantic hunt through sealed crypts, dangerous catacombs, deserted cathedrals, and the most secretive vault on earth, Langdon and Vetra follow a 400-year-old trail of ancient symbols that snakes across Rome toward the long-forgotten Illuminati lair...a clandestine location that contains the only hope for Vatican salvation. Critics have praised the exhilarating blend of relentless adventure, scholarly intrigue, and cutting wit found in Brown's remarkable thrillers featuring Robert Langdon. An explosive international suspense, Angels & Demons marks this hero's first adventure as it careens from enlightening epiphanies to dark truths as the battle between science and religion turns to war. 点击链接进入中文版： 天使与魔鬼