'Bunner Sisters' is a novel by Edith Wharton that explores the life of two sisters, Ann Eliza and Evelina Bunner, who run a small shop in New York City. As they age, they face numerous hardships, such as love, loss, and poverty. The book provides an intimate look into their struggles and their bond as sisters, portraying the harsh realities of their life in the late 19th century. The narrative is a poignant reflection of the societal norms and constraints faced by women during that period.