"Intrigue and menace mingle in one of the finest mysteries I've ever read. An amazing tale with enigma piled on secrets stacked on riddles."
--- Clive Cussler

"I would never have believed that this is my kind of thriller, but I'm going to tell you something - the more I read, the more I had to read. Dan Brown has built a world that is rich in fascinating detail, and I could not get enough of it. Mr. Brown, I am your fan."
--- Robert Crais

"Dan Brown has to be one of the best, smartest and most accomplished writers in the country. The Da Vinci Code is many notches above the intelligent thriller; this is pure genius."
--- Nelson De Mille