I think some of the best and most interesting parts of this book didn't have anything to do with the main couple or the romance. Which is a surprise after they stole the first book, the tension here came in the form of Helen's fears over a specific secret as opposed to there being a lot of romantic tension, which I missed. Granted Helen is not the type of heroine I typically favor anyhow (my favorites from previous series were Lillian, Daisy, Poppy, and Beatrix). 
 Pandora is still my favorite character here and she's less goofy and has started show some edge in this book, her interactions with Lady Berwick (who I also loved) were hilarious! There is also the introduction of a female doctor (along with the general idea of women working in fields dominated by men) who I'd love more about. I'm crossing my fingers I'm able to be more invested in the main couple in future books, seeing as I've found the first two eclipsed by side characters. 
 Probably 2.5 stars though I have a hard time equating my feelings into these kinds of ratings.