The Time Traveler's Wife is a science fiction romance novel by Audrey Niffenegger. It tells the story of Henry, a man with a genetic disorder that causes him to time travel involuntarily, and Clare, his wife who must navigate the challenges of their unusual relationship. This poignant and beautifully written book explores themes of love, fate, and the complexities of time. It combines elements of science fiction with a heartfelt exploration of human emotions.