Super Short Summary

The Good Sister by Sally Hepworth is a domestic thriller centered on the complex relationship between fraternal twins Fern and Rose Castle, characterized by psychological suspense and a mysterious plot involving murder. As the story unfolds, narrated by two seemingly unreliable narrators, the twins' intricate family dynamics are revealed, highlighting the extremes one sister will go to fulfill her desires. The novel also provides a sensitive portrayal of neurodiversity. The text discusses child abuse, murder, and other sensitive topics.