Threat Vector.

About Threat Vector

Threat Vector is a techno-thriller novel, written by Tom Clancy and co-written with Mark Greaney, and published on December 4, 2012. A direct sequel to Locked On (2011), President Jack Ryan and The Campus must prevent a Chinese expansionist government from enacting war in the South China Sea. The book debuted at number one on the New York Times bestseller list.