I just finished reading Devil's Cub, the sequel of These Old Shades. It is the story of Justin and Leonie's son, Dominic, the Marquis Vidal. The story opens when Vidal shoots a highwayman on the way to a party. This sets the character of Vidal very well, as he is very debonair, sophisticated, and can do no wrong. Every man wishes to be him, and every woman wants him.
He, however, does not want any woman. His eyes are on the lovely Sophia Challoner, but not as his wife. Instead he wishes to whisk her off to France and give her carte-blanche. In an effort to stop her sister from ruining her reputation--for Sophia thinks the Marquis means marriage--Mary Challoner takes her place. Alas, by the time Dominic finds out the switch, he is so angered that he takes Mary in her sister's place.
On their journey through Paris, Dominic discovers that Mary is nothing at all like Sophia and he has made a huge mistake. He immediately offers marriage, but Mary declines, preferring the life of a governess to that as his wife. After a sojourn in Paris, an escape attempt, and the arrival of the Duke of Avon on the scene (which Vidal was hoping to avoid at all costs), the story is in full swing.
It's a great story and I would definitely recommend her books. Right now I am tired of more recently published romance novels, especially the ones that descend quickly into the sex scenes and the love between the characters is not quite believable. I enjoy picking up a Heyer because it's a deeper read and so enjoyable. She is one author that a glom will not ruin!