Despite being warned off by a shadowy FBI contact and barely surviving an attempt on his life, combat doctor Jonathon Smith assembles a private team to investigate a mysterious virus that is randomly causing sudden, painful deaths among people of all socioeconomic levels. Reprint.

Robert Ludlum was an American author of 25 thriller novels. There are more than 290 million copies of his books in print, and they have been translated into 32 languages. Ludlum also published books under the pseudonyms Jonathan Ryder and Michael Shepherd.

Some of Ludlum's novels have been made into films and mini-series, including The Osterman Weekend, The Holcroft Covenant, The Apocalypse Watch, The Bourne Identity, The Bourne Supremacy and The Bourne Ultimatum. A non-Ludlum book supposedly inspired by his unused notes, Covert One: The Hades Factor, has also been made into a mini-series. The Bourne movies, starring Matt Damon in the title role, have been commercially and critically successful (The Bourne Ultimatum won three Academy Awards in 2008), although the story lines depart significantly from the source material.

Ludlum died in 2001 of a subdural hematoma.