Garth Greenwell’s “Small Rain” explores the isolation and unraveling of self that so many of us endured during the first COVID-19 summer. His unnamed protagonist experiences this in a way that’s magnified tenfold, as he is confined to a hospital room with a potentially fatal diagnosis: an aortic dissection. The fact he survived such low odds and remains coherent adds an underlying tension to every encounter. He is suspended in a liminal state, living on what feels like borrowed time.