Content Warning: This section of the guide references graphic violence.

Scythe & Sparrow is the third and final installment of the Ruinous Love trilogy. The three novels in the series—Butcher & Blackbird (2023), Leather & Lark (2024), and Scythe & Sparrow (2025)—trace the respective stories of the three Kane brothers—Rowan, Lachlan, and Fionn. All three novels are works of contemporary romance and fall under the dark romance subgenre.

Butcher & Blackbird follows Rowan’s story as he falls in love with Sloane. Like all of the novels in the trilogy, Butcher & Blackbird is told from the two protagonists’ alternating first-person perspectives. Both serial killers, Rowan and Sloane are devoted to eliminating other serial killers, and they soon participate in a competition with each other, racing to kill specific targets. Their violent games incite conflict and complicate the parameters of their developing romance. Key aspects of Rowan and Sloane’s romance intersect with Lachlan and Lark’s and Fionn and Rose Evans’s concurrent romances. Likewise, Rowan’s brothers and their love interests are secondary characters in Butcher & Blackbird. Weaver fleshes out their stories in the subsequent two novels.

The series’ second novel, Leather & Lark, focuses on Lachlan and Lark’s enemies-to-lovers romance.