Robert Ludlum (Bourne 06) - The Bourne Sanction

Jason Bourne needs to regain his life as David Webb, so he accepts an
invitation from his beloved mentor, Dominic Specter, to join the Linguistics
department at Georgetown. It's a relief to leave the Bourne identity
behind, but Jason soon finds himself in a life-or-death confrontation
in which every move might be his last.

Specter tells him that a former student and son of his old friend was
killed by Muslim extremists known as the Eastern Brotherhood. Their
leader is a man named Semian Icoupov, and he must be stopped because
his next terrorist target is believed to be right here in America.

While Jason is busy pursuing Icoupov in Russia, he's become a target
himself.

Inside CI, a battle is brewing for control over the agency. In order
to show the incompetence of its current director, two Pentagon operatives
plan to accomplish what CI never could: hunt Bourne down and destroy
him.