A book about romantic love, Eros is Anne Carson's exploration of the concept of "eros" in both classical philosophy and literature. Beginning with, "It was Sappho who first called eros 'bittersweet. ' No one who has been in love disputes her," Carson examines her subject from numerous points of view, creating a lyrical meditation in the tradition of William Carlos Williams's Spring and All and William H. Gass's On Being Blue.