This book may have been a victim of my high expectations. Regency period fantasy-mystery? It sounds exactly like something I ought to adore. Sadly, it can be considered "cute" at best. It's enjoyable, but formulaic, and the little bit of magic isn't particularly special. 
 One of my biggest complaints is the way other young women are treated in this book. Essentially, they don't exist for Truthful. This may just be one of my own pet peeves, but I can't stand when girls in novels don't like any other girls. Here, Truthful (or the author) assumes that all the other young debutantes either hate her because she's beautiful (and will presumably steal all the young men), or want to cozy up to her because she's beautiful (and will presumably attract all the young men). The thought never occurs that most young women have an interest in making female friends for their own sake. 
 Everything else is a somewhat silly, if entertaining, story.If you love Sorcery and Cecelia or Mary Robinette Kowal you'll probably enjoy this. I don't know that I'd recommend it to anyone not already a fan of the genre. 
 I recieved this book through Goodreads giveaways.