I am no one - Patrick Flanery

Jeremy O'Keefe, a middle-aged Professor of History, returns to his native New York after a decade teaching at Oxford, hoping to reconnect with his daughter and rebuild the life he left behind.
He settles into the rhythm of a too-empty life, long evenings alone after a day teaching students he barely knows. Then a strange encounter with a young man who presumes an acquaintance he doesn't remember and a series of disconcerting events leave him with a growing conviction that he is being watched.
The pale young man keeps appearing, a haunting figure lingers outside his apartment at night, and then mysterious packages begin to arrive.
As his grip on reality seems to shift and turn, Jeremy struggles to know whether he can believe what he is experiencing, or whether his mind is in the grip of an irrational obsession. I Am No One explores the tenuous link between fear and paranoia in our post-Snowden lives; a world of surveillance and self-censorship, where privacy no longer exists and our freedoms are inexorably eroded.