A Murder in Time by Julie McElwain
I love good time travel. I'm about 1/3 of the way into this, and it has some...issues. I'm going to keep reading, because counting the inconsistencies is kind of humorous.
The main character isn't at all trying to blend into the 19th century household in which she 'landed.' She is frequently slipping modern TV-crime-fighter jargon, like 'vic' (victim) and 'unsub' (unknown subject) into her conversations with 19th century household members. In her own time she's an FBI profiler...or is she a special agent shooting it out with a terrorist ring...or wait, she's a murder crime scene specialist. She remembers her first case where Kentucky girls were killed and dumped on the Appalachian Trail...I suppose that is possible, but not too handy since the AT doesn't run through Kentucky.
Like I said, I love good time travel, but I don't like lazy research or laughably overused plot devices. I will give it a bit more time, but so far, I can't recommend this one.