'My Sister, The Serial Killer Wins Crime Fiction Book of the Year'. ^ 'ANNOUNCING THE 2019 ANTHONY AWARD WINNERS'.

'Rankin, Braithwaite and Killing Eve win Amazon Publishing Readers' Awards'.

^ Mansfield, Katie (September 30, 2019).

^ 'Congratulations to the Winners of the Los Angeles Times Book Prizes'.

^ 'Oyinkan Braithwaite On Waiting For A Dream'.

'My Sister, the Serial Killer by Oyinkan Braithwaite – a morbidly funny slashfest'. In 2018, the novel was considered for a movie adaptation by the producers of Baby Driver. My Sister, the Serial Killer has been praised by The New York Times, The Washington Post, Marie Claire and authors Ayọ̀bámi Adébáyọ̀ and Edgar Cantero. The novel was longlisted for the 2019 Booker Prize and was the second-highest best-selling title on the list as of July 2019, with 13,052 units sold according to Nielsen BookScan. The novel won the 2019 Los Angeles Times Book Prize for Best Mystery/Thriller, the 2019 Amazon Publishing Reader’s Award for Best Debut Novel, the 2019 Anthony Award for Best First Novel, and the 2020 British Book Award for Crime & Thriller Book of the Year. My Sister, the Serial Killer was described by Deadline as a 'darkly comedic story, buzzed-about in publishing circles.' In her acknowledgements, Braithwaite thanks Ayọ̀bámi Adébáyọ̀ for adding the accents to the Yoruba language in the book. Korede fears that Tade will be Ayoola's next victim and must reckon with what she is willing to do for her sister. However, upon meeting Ayoola, he is immediately enamored with her and they begin dating. She is in love with Tade, a kind, handsome doctor who does not notice her affection. Korede feels unappreciated as she constantly dreads that they will be caught and that Ayoola will kill again, confiding in none but a comatose patient in the hospital she works at. Her practicality and concern keep Ayoola from acting suspiciously about her “missing” boyfriend, such as by posting to social media when she should be mourning. Like the previous times, Korede helps dispose of the body and clean away the evidence. For the third time in a row, Ayoola has stabbed her boyfriend to death, supposedly in self-defense. Ayoola is the more beautiful, favored sister, and possibly sociopathic.

In Lagos, Nigeria, Korede is a nurse with a close relationship with her younger sister, Ayoola. Braithwaite's debut novel, it was originally published in Nigeria as an e-book entitled Thicker Than Water in 2017, before being released in the United States by Doubleday Books on November 20, 2018.

My Sister, the Serial Killer is a 2018 thriller novel by Nigerian writer Oyinkan Braithwaite.