The Countess of Morcar's Blue Carbuncle (The Hidden Files of Dr. John H. Watson Book 1) by Sophia Sophia is basically a short story that smooshes together a rushed summary of the Adventure of the Blue Carbuncle (BLUE) with a single rather lackluster sex scene.
Sherlock-sploitation for sure, but not even an enjoyably smutty and gratuitous example of it. (I have nothing much against 'sploitation, but it should go damn-the-torpedoes full kitch. What is the point of restrained and tasteful 'sploitation?).