Enter the present day world of witches, warlocks, and high-school. Then add murder to the mix. This is the enticing recipe served up by Nikki Jefford in Entangled, the first of the Spellbound books. If the mix is something you can get into, the book is free to download on Amazon for Kindle, and you will be enchanted with what you find.
Are you looking for a sex, crime, and murder mystery set in Regency England? I'm afraid you haven't found it. All that dates the book's story is the mention of 1819 at the beginning of the first chapter. After that, it just is a generic sex and crime story. Stone Devil Duke by K. J. Jackson is showing up major defects in writing without doing at least some minimal research.
Power of the Heir's Passion by L. R. W. Lee is a sort of a prequel to the Andy Smithson series. I assure you that this is the most accurate description of afterlife available, for the world of Oomladee, not ours. It is subtitled A Novella; not quite a book but too long for a short story. And it's a ghost story from start to end.
Dive into Paris and Versailles during the time of King Louis XV. Corruption and intrigue are ripe. France is an open playing field for the Duke of Avon. the English peer has earned the nickname Satanas from his enemies. Broke as a young man, he had toured Europe as a gamester. He gambled a young Austrian noble out of his fortune and retired to enjoy a lavish and sumptuous lifestyle.
Enter the world of fantasy writers: Althalus was a thief, a crook, and an occasional murderer; he was probably the best thief in the world. And this fantasy story book is all about his adventures in a world of make believe. Or it should be about his adventures, but a few things went wrong along the way. That might seem normal for any story worth writing about. But a few things went wrong with writing the book itself. Which makes it either a bad book, or an interesting one. It depends on your point of view.