Secret agent Jason Bourne spars off against a deadly agent in this action-packed thriller from a New York Times bestselling author.

Facing down mercenaries in Africa, Jason Bourne witnesses the death of an art dealer named Tracy Atherton, which dredges up snatches of Bourne's impaired memory—in particular the murder of a young woman who entrusted him with a ring of such powerful significance that people have killed to obtain it.

Now he's determined to find the ring's owner and purpose. But Bourne never knows what terrible acts he'll discover he committed when he digs into the past.

The trail will lead him through layers of conspiracy to a vicious Russian mercenary, Leonid Arkadin, who was also a graduate of the Central Intelligence training program Treadstone—a corrupt training center designed to produce ruthless assassins. Before it was dismantled, it produced Bourne and Arkadin, giving them equal skills, force, and cunning.

As Bourne's destiny circles closer to Arkadin's, it becomes clear that the eventual collision of these men is not of their own making. Someone else has been watching and manipulating them. Someone who wants to know: who is the deadlier agent?