"The Fifth Child" is a novel by author Doris Lessing that explores the complexities of family life and societal expectations. The story follows the lives of David and Harriet, a couple who dream of a large, happy family. However, their lives take a dramatic turn when they have their fifth child, Ben, who exhibits disturbing behavior that challenges their ideals. As Harriet struggles to cope with Ben's unconventional nature, the family's dynamics begin to unravel. The novel raises questions about love, acceptance, and the limits of parental responsibility, ultimately highlighting the tension between societal norms and individual differences.