The Windows

From City Journal, a short story by Andrew Klavan:

This morning, his coffee half-done, he stopped by the window beside his desk. Lifted the slats on the shutter. Peeked out at the sidewalk three stories below: the sidewalk and the brownstones and the pale green sycamores of West 69th Street near the park. Suits and skirts on their way to work. Artists and neighborhood ladies walking their dogs. No one suspicious. No one standing strangely still, watching his window. As there sometimes was. Or as he sometimes thought there was.