Thus John Nordholm, the alternately shy and brash hero of the first story here, is also the narrator of the last. Yet there is a sense in which all sixteen of these stories knock at the same door, a door that in “Dentistry and Doubt” swings open, and in “Toward Evening” remains shut. The characters are polite, nervous, diffident, as if life—or at least youth, for they are all young—were a discomfiting wait in the anteroom of the absolute. The majority of these stories depict encounters between strangers and their unexpected effects, which can be as concrete as a roomful of flowers or a bottle of wine, or as intangible as a miracle or a dream.