The Duchess's Investigative Society Series Novels

Seductions of a Duke's Daughter (The Duchess's Investigative Society 4) by Samantha Holt
Wagers of a Duke's Daughter (The Duchess's Investigative Society 3) by Samantha Holt
Temptations of a Duke's Daughter (The Duchess's Investigative Society 2) by Samantha Holt
Secrets of a Duke's Daughter (The Duchess's Investigative Society 1) by Samantha Holt