Cocktails & Chloroform — Kelley Armstrong

For modern-day detective Mallory Atkinson, being trapped in the body of a Victorian housemaid means overcoming endless obstacles. Her current challenge is winning over the suspicious young parlormaid, Alice. Mallory's plan starts with teaching the girl to make Molotov cocktails, which is a perfectly valid science experiment and not at all a desperate ploy to gain Alice's attention. Before the lesson can begin, though, Alice receives a letter that has her slipping off in the night. Concerned for her safety—and naturally curious—Mallory follows.Mallory finds Alice at what seems like a simple dance hall, watching young men and women flirting and whirling in pretty dresses and dapper suit-coats. But nothing here is what is seems, and what starts as a simple surveillance exercise turns into a full-scale spy mission with Mallory's boss, Dr. Duncan Gray, at her side. Before the evening is done, those Molotov cocktails are probably going to come in handy.Note this is not a full-length novel. It's a novella set after The Poisoner's Ring.