I picked this one up on Barbara Hambly’s Smashwords page. It’s a novelette set during the time when Benjamin January is off in Washington(Good Man Friday)investigating a disappearance and a murder and meeting Edgar Allan Poe. His wife Rose goes with her mother-in-law Livia, her husband’s nephew and her sister-in-law Olympe’s in-laws to a masquerade party and finds herself investigating a murder closer to home, with the help of her husband’s delightful Irish friend, the fiddler Hannibal Sefton, who was playing at the party. And also - Livia! If you’re familiar with the series, you know that free man of colour Benjamin January’s mother Livia Levesque is a snooty woman who wouldn’t have the likes of his other white friend, policeman Abishag Shaw, in her nice clean house. However, she knows absolutely everything that’s going on and everyone in the free coloured community, through gossip. And that means she can tell Rose a lot of things she needs to know to help solve the mystery. One thing she does towards the end of the story, while Rose, Hannibal and Abishag are off asking questions delighted me so much that I will never see Livia in the same light again.
I found myself falling comfortably back into this universe. I do recommend that you read at least some of the books before trying this extension.
This is part of Barbara Hambly’s “Further Adventures” stories, in which she tells extra tales in the lives of her characters from the various series she has done over the years, plus a few Sherlock Holmes tales. You can get some of them on iBooks, all of them on Smashwords.