The West is under its greatest threat yet in Mark Russinovich's Trojan Horse. A revolutionary, invisible computer virus that alters data without leaving a trace--more sophisticated than any seen before--has been identified within the computers of the United Nations, roiling international politics. Cybersecurity analysts Jeff Aiken and Daryl Haugen are summoned to root it out and discover its source.

As the virus penetrates Western intelligence, and the terrifying truth about its creator is revealed, Jeff and Daryl find themselves in a desperate race to reverse it as the fate of both East and West hangs in the balance.