A Secret Engagement — Sarah Richmond

Edmund Caruthers, London barrister and gentleman, defies his father and his class to represent the poor. With few paying customers, he struggles financially. He's frustrated his betrothed won't set a date to marry him.
Dolly Wycliffe dreams of becoming a famous milliner. She loves Edmund, but the life of a society matron isn't for her. Edmund's family and friends remind her that a girl who makes hats can't become the wife of a distinguished barrister.
When a woman is found murdered in fashionable Mayfair, their two worlds collide. The victim is a shop girl and Dolly enlists Edmund's help to find the killer. Edmund keeps a friend's involvement a secret and Dolly realizes the toffs have rules they're unwilling to break.
Is their love enough to overcome the obstacles ahead? Will marrying be a decision they'll both come to regret?