"The Lightkeeper's Daughter" is a novel by Holly E. McGhee that tells the story of a young girl named Maggie who lives in a lighthouse with her father, the lightkeeper. The narrative explores themes of family, love, and the challenges of growing up in a unique environment. As Maggie navigates her life, she discovers the importance of her father's role and the history of the lighthouse. The story highlights her journey of self-discovery and the bonds that connect her to her family and the sea, ultimately revealing the significance of heritage and belonging.