Oyinkan Braithwaite's novel, "My Sister, the Serial Killer" introduces the two main characters, Korede, a nurse, and her sister Ayoola, who is a serial killer. The text provides a glimpse into Korede's life as she tries to manage her sister's murderous tendencies while navigating her own personal and professional life. The book makes use of a dark comedic tone, while exploring themes of family, love, and the complexities of human nature.