"Jacob Have I Loved" is a novel by Katherine Paterson that tells the story of Louise, a young girl growing up on a small island in Maryland. She struggles with feelings of jealousy and inadequacy, particularly in relation to her twin sister, Caroline, who seems to receive all the attention and praise. The story explores themes of identity, sibling rivalry, and the quest for self-acceptance. Set against the backdrop of the island's fishing community, the novel highlights Louise's journey as she seeks to carve out her own identity. Through her experiences, she learns valuable lessons about love, sacrifice, and the importance of embracing one's unique path in life.