The Covenant of Water is a 2023 historical fiction novel by Abraham Verghese that follows three generations of a Christian family in Kerala, South India, from 1900 to 1977, who are afflicted by a mysterious condition in which at least one member of each generation drowns. The epic story explores themes of love, faith, medicine, and family secrets against a backdrop of immense social and political change in India, centered around a strong matriarch known as Big Ammachi.