In the vein of Jesmyn Ward's Salvage the Bones and Sue Monk Kidd's The Secret Life of Bees, a coming-of-age novel told by almost-eleven-year-old Kenyatta Bernice (KB), as she and her sister try to make sense of their new life with their estranged grandfather in the wake of their father's death and their mother's disappearance An ode to Black girlhood and adolescence as seen through KB's eyes, What the Fireflies Knew follows KB after her father dies of an overdose and the debts incurred from his addiction cause the loss of the family home in Detroit. Soon thereafter, KB and her teenage sister, Nia, are sent by their overwhelmed mother to live with their estranged grandfather in Lansing, Michigan. Over the course of a single sweltering summer, KB attempts to navigate a world that has turned upside down.