You could read My Sister, The Serial Killer in an afternoon. Braithwaite’s writing pulses with the fast, slick heartbeat of a YA thriller, cut through by a dry noir wit ... Braithwaite’s portrait of Lagos, with its seedy corruption and choking traffic and rigid family norms, makes that search for identity feel even more stifled, more predetermined. It is a portrait in pain, but also in a dark kind of humor.
Braithwaite’s blazing debut is as sharp as the knife that twists in the chest ... The reveal at the end isn’t so much a 'gotcha' moment as the dawning of an inevitable, creeping feeling that Braithwaite expertly crafts over the course of the novel. This is both bitingly funny and brilliantly executed, with not a single word out of place.
...a dryly funny and wickedly crafty exercise in psychological suspense ... But besides the setting, what makes Braithwaite’s first novel stand out from others in this genre is the unobtrusively sly approach she takes to the conventions of 'black widow' storytelling ... Even your most extravagant speculations about what’s really going on with these wildly contrasting yet oddly simpatico siblings will be trumped in this skillful, sardonic debut.