Harvard professor of symbology Robert Langdon awakens in a hospital in the middle of the night. Disoriented and suffering from a head wound, he recalls nothing of the last thirty-six hours, including how he got there . . . or the origin of the macabre object that his doctors discover hidden in his belongings. Langdon's world soon erupts into chaos, and he finds himself on the run in Florence with a stoic young woman, Sienna Brooks, whose clever maneuvering...

After a mountainside massacre yields a grim message, Painter Crowe, director of Sigma Force, must join with Commander Grayson Pierce and an unlikely ally if he is going to get to the root of a conspiracy that stretches back to a lost prehistoric colony in America.

Four United States presidents have been assassinated-in 1865, 1881, 1901, and 1963-each murder seemingly unrelated and separated by time. But what if those presidents were all killed for the same reason: a clause in the United States Constitution-contained within Article 1, Section 8-that would shock Americans? This question is what faces former Justice Department operative Cotton Malone in his latest adventure. When a bold assassination attempt...

He saved the Catholic Church from a fundamentalist radical in Angels & Demons and exposed the world's greatest cover-up in The Da Vinci Code. Now, symbologist and Harvard professor Robert Langdon returns to uncover another mystery. Called to Washington D.C., Langdon must investigate the centuries-old secrets of the Freemasons. However, with treachery around every corner, will Langdon's eidetic memory and insurmountable knowledge of history be able...

A million dollars, or a clue? Police report a break-in at an elite hotel, and the suspects sound suspiciously like Amy and Dan. There's a car and speedboat chase and an angry mob! When there's a clue on the line, anything can happen.

A mysterious telegram sends Amy and Dan Cahill off to Russia, where they search for a treasure stolen by the Nazis, the truth about the end of the Romanov dynasty, and information about the death of their parents.

When the NSA's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls its head cryptographer, Susan Fletcher, a brilliant and beautiful mathematician. What she uncovers sends shock waves through the corridors of power. The NSA is being held hostage...not by guns or bombs, but by a code so ingeniously complex that if released it woud cripple U.S. intelligence. Caught in an accelerating tempest of secrecy...

Thirteen-year-old Dan Cahill and his older sister, Amy, thought the search for the thirty-nine clues leading to the source of their family's power was over, but when Cahills are kidnapped by the Vespers, Amy and Dan find themselves with only a few day to fulfill a bizarre ransom request before their friends start dying.

Amy and Dan continue their search for the clues and cross oceans amid ruthless enemies and dangerous truths while following the trail of a famous aviator.

Thirteen-year-old Dan Cahill and his older sister Amy race against time to find an ancient map that has not been seen for half a century and use it to redeem their family members who have been kidnapped by a sinister organization called the Vespers.