The era got me confused a little, because I'm SO used to regencies being comedies, that this more intense and serious novel was kind of a "culture shock". I've heard it referred to as more in the style of Julie Klassen, rather than Georgette Heyer. Some of the characters were distinctly regency, while I found myself imaging a few of them as belonging more to the Medieval era... parts of the story almost seemed like a fantasy novel- or a fairy tale- but realistic. (Yea, you figure that one out! ;P)
Madeline leanrs that God orchestrates everything to fit perfectly into His plan, and that He has a reason for everything; she must learn to annihilate the bitterness within her.
Devlin learns to better understand those around him who are struggling- to speak and comfort from his heart and not rashly out of his head. (Having low tolerance issues does not help when trying to reason with a lady, Ravensmoore!)
Both hero and heroine have a journey of faith and growth to go through, riddled with mystery, suspense, sinister villains, and a few comical and lighthearted friends (Simon, Hally & Melton).