"Jacob Have I Loved" is a novel written by Katherine Paterson, published in 1980. Set on a fictional island in the Chesapeake Bay during World War II, the story revolves around the life of Sara Louise Bradshaw, who feels overshadowed by her twin sister, Caroline. The novel explores themes of jealousy, sibling rivalry, identity, and self-discovery as Sara Louise struggles to find her place and define herself independently of her sister. The title is a reference to the biblical story of Jacob and Esau, emphasizing the theme of favoritism and the struggle for individual recognition. Paterson's writing delves deep into the complexities of familial relationships and the challenges of growing up.