"Lucy Sullivan Is Getting Married" is a novel by Catherine Alliott that follows the life of Lucy Sullivan, a young woman in her thirties. As she navigates her career and friendships, Lucy faces the pressures of societal expectations regarding marriage and relationships. The story unfolds as Lucy's friends encourage her to find a partner, leading her to question her own desires and choices. Throughout the narrative, themes of love, self-discovery, and the complexities of modern relationships are explored, making it a relatable and engaging read for many.