My Sister, the Serial Killer by Oyinkan Braithwaite (2018)
Oyinkan Braithwaite's debut novel is a classic tale of sibling rivalry with a dark twist—one of the sisters happens to be a serial killer. In its darkly humorous telling, this book explores universal questions about the relationship between two sisters and how their lives intertwine in ways that can never be undone. My Sister, the Serial Killer is a character study, a love story, and a family drama all rolled into one. Oh, and given that one of the sisters can't seem to avoid murdering any man that shows interest in her, it's also a bit of a crime drama too.
This is a book about love and loyalty that asks the question: How do you choose between doing the right thing and doing what you know to be right?