ACKNOWLEDGMENTS A debt of gratitude to Emily Bestler, Jason Kaufman, Ben Kaplan, and everyone at Pocket Books for their belief in this project. To my friend and agent, Jake Elwell, for his enthusiasm and unflagging effort. To the legendary George Wieser, for convincing me to write novels. To my dear friend Irv Sittler, for facilitating my audience with the Pope, secreting me into parts of Vatican City few ever see, and making my time in Rome unforgettable. To one of the most ingenious and gifted artists alive, John Langdon, who rose brilliantly to my impossible challenge and created the ambigrams for this novel. To Stan Planton, head librarian, Ohio University Chillicothe, for being my number one source of information on countless topics. To Sylvia Cavazzini, for her gracious tour through the secret Passetto. And to the best parents a kid could hope for, Dick and Connie Brown... for everything. Thanks also to CERN, Henry Beckett, Brett Trotter, the Pontifical Academy of Science, Brookhaven Institute, FermiLab Library, Olga Wieser, Don Ulsch of the National Security Institute, Caroline H. Thompson at University of Wales, Kathryn Gerhard and Omar Al Kindi, John Pike and the Federation of American Scientists, Heimlich Viserholder, Corinna and Davis Hammond, Aizaz Ali, the Galileo Project of Rice University, Julie Lynn and Charlie Ryan at Mockingbird Pictures, Gary Goldstein, Dave (Vilas) Arnold and Andra Crawford, the Global Fraternal Network, the Phillips Exeter Academy Library, Jim Barrington, John Maier, the exceptionally keen eye of Margie Wachtel, altmasonic. members, Alan Wooley, the Library of Congress Vatican Codices Exhibit, Lisa Callamaro and the Callamaro Agency, Jon A. Stowell, Musei Vaticani, Aldo Baggia, Noah Alireza, Harriet Walker, Charles Terry, Micron Electrics, Mindy Renselaer, Nancy and Dick Curtin, Thomas D. Nadeau, NuvoMedia and Rocket E-books, Frank and Sylvia Kennedy, Simon Edwards, Rome Board of Tourism, Maestro Gregory Brown, Val Brown, Werner Brandes, Paul Krupin at Direct Contact, Paul Stark, Tom King at Computalk Network, Sandy and Jerry Nolan, Web guru Linda George, the National Academy of Art in Rome, physicist and fellow scribe Steve Howe, Robert Weston, the Water Street Bookstore in Exeter, New Hampshire, and the Vatican Observatory. FACT The world's largest scientific research facility - Switzerland's Conseil Européen pour la Recherche Nucléaire (CERN) - recently succeeded in producing the first particles of antimatter. Antimatter is identical to physical matter except that it is composed of particles whose electric charges are opposite to those found in normal matter. Antimatter is the most powerful energy source known to man. It releases energy with 100 per cent efficiency (nuclear fission is 1.5 per cent efficient). Antimatter creates no pollution or radiation, and a droplet could power New York City for a full day. There is, however, one catch... Antimatter is highly unstable. It ignites when it comes in contact with absolutely anything... even air. A single gram of antimatter contains the energy of a 20-kiloton nuclear bomb - the size of the bomb dropped on Hiroshima. Until recently antimatter has been created only in very small amounts (a few atoms at a time). But CERN has now broken ground on its new Antiproton Decelerator - an advanced antimatter production facility that promises to create antimatter in much larger quantities. AUTHOR'S NOTE References to all works of art, tombs, tunnels, and architecture in Rome are entirely factual (as are their exact locations). They can still be seen today. The brotherhood of the Illuminati is also factual.