By the third book, I'm pretty familiar with Camden's style. It's a bit dry for my tastes but not bad. A bit formal but that's possibly due to the time period. What I like is that though the romance is central to the story, it's not the actual story. Both characters have other goals and pursuits. Luke probably has the best character arc. Marianne's arc is told a lot more than shown, but Luke gets concrete turning points that make sense.
And these stories are always a little surprising. Camden skims over the things I expect her to dive into or what I think are going to be major plot points are brushed aside in a quick “four months later” paragraph. That leaves room for other parts of the story to come to the forefront so a lot of plot happens.
My one complaint with this book is that it's the most repetitive of the three. And it's not that bad but Marianne's inner monologue never seems to stop saying how loyal she is to her family and how she must be grateful to them always for taking her in. It becomes a refrain and might be part of her lack of growth as a character. She thinks the same thing again and again for ages and then her turn is abrupt. Not that she doesn't have her reasons but she had tons of reasons before and then all the sudden she just pivots.
Other than that, though this is a perfectly decent book and a mildly enjoyable read. Nothing dramatically compelling or engaging. But also nothing worth complaining about.