Sarah MacLean’s 2010 Regency romance, Nine Rules to Break When Romancing a Rake , centers on Lady Calpurnia "Callie" Hartwell as she moves past her wallflower persona to experience scandalous adventures, aided by the notorious Gabriel St. John. The narrative follows their blossoming romance, sparked by a mutually beneficial agreement that leads to breaking society's rules and finding love. You can find the book at Barnes & Noble or Amazon .