Death by an Invisible Hand

But a new friend, a professor at a nearby university, desperately needs his help. Someone is stalking Van Rhodes and threatening his life. Van is confused, angry, and scared. He's under siege wherever he turns and doesn't know why.

While Jorge attempts to uncover Van's murderous pursuer, he stops a mugging near his home. His quick actions, which rescue a homeless man, may also provide a way to save Van's life.