Books like Tell Me, Pretty Maiden by Rhys Bowen

When a 15‑year‑old orphan named Mary Russell stumbles upon retired Sherlock Holmes in Sussex, she becomes his apprentice and partner, uncovering a case that drags them into international intrigue.

A gripping mystery set in London during the 1920s as Maisie Dobbs investigates a brutal murder of a street vendor.

In spring 1930, Maisie Dobbs is hired to locate a runaway heiress. When three of the heiress’s former friends are found dead, she races to uncover who would murder these respectable young women before it’s too late.

Molly Murphy, a sharp private investigator, infiltrates a New York senator’s home to uncover the truth behind his wife’s mysterious search for a lost son through famed Sorensen sister spiritualists.

It is an hour of desperate need for St. Frideswide's. Thrust into financial ruin by the incompetence and corruption of their former prioress, the nuns have become trapped under the thumb of Abbott Gilberd as he pries into every possible corner of the priory's life. In an effort to escape their desperate straits, Dame Frevisse is forced to journey to London in order to seek both a new prioress and financial aid for her beleaguered sisters. Once there, she turns to her wealthy cousin Alice, lady wife of the influential earl of Suffolk. But with a new Parliament warming to its arguments, Frevisse discovers that Alice's need may be even greater than her own. Caught between the powerful Gloucester, the machiavellian Bishop Beaufort, and the darkly handsome Duke of Orleans, Alice is torn by the broken loyalties of those she loves the most. Before she can unravel the twisted turns of romance and deception, Frevisse herself is caught up in the intrigue, carrying secret messages which will determine England's future. But the mystery deepens when one of the other messengers is killed, and Frevisse must solve the murder in order to save not only herself, but Alice's immortal soul. Sister Frevisse - Book 08

Irish-born detective Molly Murphy, a Vassar graduate, investigates the mysterious deaths of her friend’s missionary parents and her own inheritance loss, while another Vassar graduate seeks a philandering husband in early 20th‑century New York.

In 1901 New York, Irish‑American Molly Murphy battles prejudice to become a private detective, uncovering a missing aristocratic daughter while infiltrating the garment trade to expose industrial espionage.