Half a Soul by Olivia Atwater

As a child, Dora Ettings wandered into Faerieland, and had half her soul stolen away. Since then she's only experienced emotions in a detached way. She feels neither fear not embarrassment, and doesn't see how falling in love would be remotely possible. 

Now, Dora's accompanying her cousin, Vanessa, to London in the hope of finding husbands for them both during the Season.  In polite society, say at a ball, Dora's curse makes her inclined to say or do the wrong thing, but when her aunt tries to pair her off with Albert Lowe, an eligible 'younger son' who helps as a doctor in the city's workhouses, Dora's lack of feeling proves invaluable; the dreadful conditions she encounters don't repulse her, and she's able to calmly assist when needed. This isn't, of course, what her aunt had planned. Nor is a close association with the Lord Sorcier, Elias Wilder, who she meets though Albert and his investigation into a mysterious sleeping sickness spreading among the workhouse children. 

I'd expected a light Regency Bridgerton-style romcom, with a hint of faerie magic, but found something with more grit. Yes, there are balls and romance, but there are also darker undercurrents which I think made it more compelling for me. On one hand, there's the dark world of Faerie which threatens to trap Dora, just as everything seems to be going well for her. On the other, the work of Albert and Elias among the poor exposes the very real conditions of 19th century workhouses, and also the lack of concern shown by much of society for anyone unfortunate enough to end up there. Neither Bridgerton nor Austen's works concern themselves much with the world beyond 'society', but here the reader is forced to see beyond the fancy ballgowns and marriage market, and encounter complacent attitudes which seem very common today.

I understand there are further books planned in this series, and I'm intrigued to discover what they're like.