The book "How to Kill Your Family" by Bella Mackie is a darkly comedic thriller centered around Grace Bernard, a woman who seeks revenge on her absentee millionaire father and his family for abandoning her and her dying mother financially and emotionally. Grace meticulously plans and kills six members of her father's family one by one. Ironically, she ends up imprisoned for a murder she didn't commit. While in prison, she writes her story, which becomes the narrative of the novel. The book explores themes of class, family, love, and murder with a mix of dark humor and social commentary. It is not a literal guide for killing family members but rather a fictional tale of calculated revenge and its consequences.