"Daisy Miller: A Study" is a novella written by Henry James, first published in 1878. It is one of James's early works and is considered a masterpiece of American literary realism.

The story revolves around the title character, Daisy Miller, a young and free-spirited American girl traveling in Europe with her mother. The novella is set primarily in Switzerland and Italy, where Daisy's behavior and interactions with the sophisticated European society become a subject of scrutiny and gossip among expatriates.

The plot explores themes of innocence and ignorance, social class and customs, and the clash between American and European cultures. Daisy's independent and unconventional behavior, such as her casual interactions with men and disregard for social norms, creates tension and leads to her eventual downfall in the eyes of the society she encounters.

Through the character of Daisy Miller, James critiques both American innocence and European sophistication, as well as the rigid social expectations of the time. The novella is known for its psychological insight, nuanced character portrayal, and exploration of the complexities of human behavior and societal norms.

"Daisy Miller: A Study" remains a significant work in American literature, influencing later writers and continuing to be studied for its exploration of cultural differences, personal freedom, and the consequences of nonconformity.