The Ruinous Trilogy by Brynn Weaver

The Ruinous Love Trilogy by Brynne Weaver is a popular dark romantic comedy series focusing on rival murderers, contract killers, and morally gray antiheroes finding love.

The interconnected books blend suspense, wit, and high spice levels, following a different couple in each story.

The series follows this reading order:

Book 1: Butcher & Blackbird, A "friends-to-lovers" dark romantic comedy about two rival vigilante serial killers who bond over their shared hobby of eliminating other serial killers.

Book 2: Leather & Lark, A "marriage of convenience/hate-to-love" romance following a brooding contract killer and a sunshine-filled indie singer-songwriter who make a deal to hunt down a phantom threat.

Book 3: Scythe & Sparrow, Features a cynical doctor running from a broken heart who gets more than he bargained for when a wounded motorcycle performer from the circus crashes into his life.