I read anything and everything
Courtney Milan calls this a coda to The Brothers Sinister series. It's a lovely short read. Here's the blurb from her website:
Nobody knows who Miss Rose Sweetly is, and she prefers it that way. She’s a shy, mathematically-minded shopkeeper’s daughter who dreams of the stars. Women like her only ever come to attention through scandal. She’ll take obscurity, thank you very much.
All of England knows who Stephen Shaughnessy is. He’s an infamous advice columnist and a known rake. When he moves into the house next door to Rose, she discovers that he’s also wickedly funny, devilishly flirtatious, and heart-stoppingly handsome. But when he takes an interest in her mathematical work, she realizes that Mr. Shaughnessy isn’t just a scandal waiting to happen. He’s waiting to happen to her…and if she’s not careful, she’ll give in to certain ruination.
Stephen Shaughnessy was a character in The Suffragette Scandal, and here he's given room to breathe.
Rose is a "computer" and here's Courtney Milan explaining what they were in the Author's Note:
There isn’t much known about the history of female computers. They came into prominence in World War II, when female computers served in the Manhattan project, and helped crack the German’s Enigma code. But they existed before that. Very little is said about the computer, either male or female, so I’ve had to interpolate.
The other source of inspiration for this was a real woman. Her name is Shakuntala Devi, and she was known as the human computer for her ability to calculate complex cube roots in her head in a matter of seconds. Her roots were modest—her father was a circus performer—but not only was she a mathematical genius, she also wrote cookbooks, nonfiction on homosexuality, nonfiction on learning mathematics, and novels (many of these are available as ebooks today). She even ran for office.