Donner & Longstreet Mystery Books in Order

This series moves to New York City in 1899, when the city is growing upward, outward, and rougher at the edges. It is a world of drawing rooms and dockside streets, new money and old rules, private grief and public scandal. Into that world step Finola “Fin” Donner and Devorah Longstreet, lovers and private inquiry agents who make an unlikely and very appealing team.

Fin is the streetwise half of the pair. She comes from the dockside slums and knows how to read danger, lies, and the city’s harder corners. Devorah comes from money, polish, and Fifth Avenue expectations, but she is no ornament. She is smart, observant, and willing to use her social standing when a case calls for it. Their differences are not just flavor. They are the method.

They are ahead of their time, but not magically free of it.

In A Crime of Secrets, the first book, the murder of young Pauline Godfrey pulls them into a case that reaches from respectable homes to corrupt police and the city’s criminal underworld. Family secrets, class pressure, and hidden desire all matter. So does the fact that Fin and Devorah are trying to build a life together in a world that would rather keep women like them quiet, careful, and out of sight.

That tension gives the series its shape. These are historical mysteries, but the history is not there just for costume. The setting changes what the women can say, where they can go, and how much risk comes with every choice. When Fin pushes into a dangerous neighborhood or Devorah questions someone from her own social circle, each woman is using the kind of access the other does not have. Together, they can move between social worlds the police either ignore or protect.

The tone lands somewhere between classic detective fiction and Gilded Age city noir. There is elegance here, but never too much of it. Aptaker cares about gaslit streets, social codes, and period detail, yet she keeps the focus on the human mess underneath: greed, violence, love, shame, and the ways powerful people hide what they have done.

That contrast is what makes the series easy to settle into. You get a crime to solve, a sharply drawn city, and a central relationship that feels lived-in from the start. If you want historical mystery with queer leads, a strong class contrast between its sleuths, and a New York setting that feels both grand and dangerous, Donner and Longstreet gives you a very good place to begin.