The Curious Case of the Whispering Corpse

Lady Charlotte Astley is burdened with more things than London's best monster hunter should be-solving supernatural crimes and being a proper lady.
First, she must make the streets of London safe for everyone-humans and supernaturals alike. Second, Charlotte is unmarried and has no prospects-a capital offense according to the upper crust. Social niceties don't simply disappear because vampires and werewolves appear in London and integrate into society; Charlotte's top priority should be marrying a nice human boy-at least according to her aunt. Never mind that her best friend, Lord Cosmo Wilmott (devilishly charming, mischievous, wildly handsome, and vampire) is hoping Charlotte would be willing to defy society and convention for him.
When supernatural corpses begin appearing in Spitalfields alleyways, all whispering a single word and drained of their souls, even Charlotte is perplexed. Can she figure out what is actually happening to London's supernatural society? Will her monster-hunting and sleuthing abilities find this soul-eater or will London explode into a second civil war? Finally, who is the behind these soulless corpses, and do they have any raspberry scones?
For fans of The Parasol Protectorate, this is a Supernatural TV show meets X-Men with a female Sherlock.
A friends to lovers, slow burn, low-spice, semi-oblivious, sunshine x grump (mild), steampunk fantasy, vampire romance.