This book suffers of an incurable oldness decay.
And yet its prose and style are very elegant, accurate and even enjoyable for those who don't mind Daisy Miller's advanced age.
From cosmopolitan Vevey (not yet known as the Charlie Chaplin's buen retiro) to a Grand Tour-shaped Rome where there are more chances to meet a mumbling Wolfgang Goethe than Gregory Peck and Audrey Hepburn riding a Vespa.
This novel is mainly about the contrasts between an upcoming "modern" liberal generation of party-goers and the puritan dogmas of the old jet-set society.
Nowadays Daisy Miller's behavior is pretty far from our idea of "flirting", but chaste Henry James intended her as the heroine of a changing upper-class world.
By reading the book one may think the author sympathized more with the self-righteous and hypocritical people of his generation than with Miss Miller, but at least he understood how that dusty world of him was going to cease very soon.