The Duke's Undoing is my first G.G. Vandagriff novel. I really like most of the regency romance novels I've read, but I have been very disappointed to find that clean regency romances are hard to come by. The Duke's Undoing has a lot of sensuality (especially in the latter part). Compared to most regency romances, it is probably tame, but while I appreciated that the characters make a huge effort to restrain their passion, their desires are no secret to the reader.
The last part of the book seemed somewhat rushed and mostly focused on passion. Prior to that, I really enjoyed Elise and Peter's story. Elise's one true love died in war, and she's had two failed engagements since then. Enter the Duke of Ruisdell (Peter, a rouge). Peter is totally wrong for Elise, but he finds himself drawn to not only her beauty, but her genuine goodness. Peter is able to protect Elise from her ex-fiancées, and through some entertaining ups and downs, they develop a relationship that draws both of them out of their tortured shells.
Entertaining story, but it would have been much better if the sensuality was toned down.