It was September 18, 2001, just seven days after al-Qaeda hijackers destroyed the Twin Towers. In the early morning darkness, a lone figure dropped several letters into a mailbox. Seventeen days later a Florida journalist died of inhalational anthrax. The death from the rare disease made world news. These anthrax attacks marked the first time a sophisticated biological weapon was released in the United States. It killed five people, disfigured at...

A lethal germ is unleashed in the U.S. mail. A chain of letters spreads terror from Florida to Washington, D.C., from New York to Connecticut, from the halls of Congress to the assembly lines of the U.S. Postal Service. Five people die, and ten thousand more line up for antibiotics to protect against exposure. The government, already outsmarted by the terrorist hijackers of 9/11, leaves its workers vulnerable and a diabolical killer on the loose. Based...