Robert Ludlum's The Bourne Legacy

"David Webb has been living a quiet life as a university professor in the backwoods of America with his wife and children. But someone is about to shatter his peace. A silenced gunshot narrowly misses his head. Then he finds his two friends dead. A deadly assassin is on his trail and David Webb must once again turn to Jason Bourne to save his life and family ..."--Publisher description.