The Light in the Duke's Shadow, by Abigail Agar.
Lady Penelope Winchester had a mind of her own when it came to marriage, particularly after having read her great-grandmother's, grandmother's and mother's journals which detailed unhappy marriages to domineering men. Much to her mother's dismay, she turned away offer after offer--affected by her own father's tyrannical attitude towards his wife. Penelope dreamt of love and understanding, not something her mother believed she would find.
That's why, when she meets Jules Daventry, Duke of Richmond, struck down in an alley following a ball, it came as a surprise to her that she found him copacetic. Even though his name had been dragged through the mud by a scandal involving the death of his parents, Penelope knew, with her painter's soul, he was not a murderer. What's more, if she hadn't found him, he would have died.
What follows is a slowly budding love affair in which Penelope not only defies her parents to help the Duke, but Jules has to make a choice between revenge for his parents' death, and a life with a sympathetic partner. He chose the latter, but not before he discovers the extent of the betrayal that led to the death of his mother and father. Through it all he receives the strong support of Penelope, who stands up to her parents' oppression.
I found this a fascinating read, not only because of Penelope's staunch character, but because so many back channels were at work to bring the Duke down. The betrayal of those closest to us is always a great fear, and the Duke survived it in spades although not without a near-death experience.
This enjoyable book is part mystery, part twisted criminal puzzle, and part love affair. Fortunately, the love affair wins out.