From the New York Times Bestselling Author of 'Zodiac' and 'Zodiac Unmasked'.

AMERICA WAS THE CRIME SCENE

Six days after the devastating events of 9/11, as the dust still clung to the air over New York, a new terror descended upon America. An invisible enemy that when inhaled, fatally ravaged the lungs, body, and brain.

Mysterious envelopes filled with lethal powder contaminated everything and everyone they came in contact with. They began arriving at their destinations and unsuspecting victims inhaled the microscopic dust particles carrying the Bacillus anthracis bacteria, more commonly known as anthrax. In this weaponized form, inhalational anthrax is at its most lethal.

These poison pen letters would contaminate USPS mailboxes, machinery, letter carriers, mailrooms, newsrooms, and the Capitol, all starting with an entire building in Boca Raton, Florida. Putting in motion one of the most critical manhunts in US history.

This is the definitive story of the insidious threat—and the relentless hunt to stop America's most sinister bio-terrorist.