Deep conversations over an untouched pile of books were a common occurrence for Mary and Paul, even before they’d begun questioning everyone’s uncharacteristic behavior. They had a broad view of the neighborhood from the window-encased alcove where Mary’s family ate their meals, but neither noticed the harsh glare of the afternoon sun, the faded blue sky or the children playing on a makeshift bike ramp in the middle of the street. As often happened when they were together, they were int...