•Why it earns a slot
Daisy Miller crystallizes the late-nineteenth-century transatlantic clash of social codes through a single irresolvable question about one girl's character, making it a foundational text for James's career-long examination of American innocence destroyed by European judgment.
Frederick Winterbourne, an American long resident in Europe, meets the vivacious and unconventional Daisy Miller in Switzerland and follows her social career in Rome, where her free behavior with an Italian acquaintance scandalizes the expatriate American community. Unable to decide whether Daisy is innocently ignorant of European social codes or genuinely reckless, Winterbourne withholds the full warmth of his regard. Daisy contracts malaria after a moonlit visit to the Colosseum with her Italian companion and dies, and only afterward does Winterbourne learn she was innocent all along and had wished for his good opinion.
This distillation is written from the freely available original, which is always the better read when you have the time: gutenberg.org.