The Bourne Sanction Jason Bourne Series, Book 6.

Jason Bourne returns to Georgetown University and the mild world of his alter ego, David Webb, hoping for normalcy. But after so many adrenaline-soaked years of risking his life, Bourne finds himself chafing under the quiet life of a linguistics professor. Aware of his frustrations, his academic mentor, Professor Specter, asks for help investigating the murder of a former student by a previously unknown Muslim extremist sect. The young man di...