Books like A nun in the closet by Dorothy Gilman

A locked‑in murder on the Orient Express forces detective Hercule Poirot to unravel a mystery among a diverse group of passengers during a snowbound night.

Arthur Conan Doyle’s classic detective tale follows Sherlock Holmes and Dr. Watson as they investigate the legend of an undead hound on Dartmoor, revealing secrets that threaten a family’s legacy.

A charming and clever women detective, Precious Ramotswe, solves mysteries in Botswana's small town of Midsomin, South Africa, from 1986 to 1997, facing dangers and love in the process. The novel is beloved by readers worldwide for its clever dialogue and characters who are as flawed as the rest of us. The book is a bestseller and has been translated into 45 languages, including Polish, German, and Japanese, among others. It was also voted one of the International Books of the Year and the Millennium by the Times Literary Supplement.

Inspector Alan Grant of Scotland York investigates the true identity of King Richard III, challenging the historic image of the notorious Tudor tyrant.

The House of God exposes the harsh realities of medical training, illustrating a strict hierarchy in hospitals and the pressures faced by residents, interns, physicians, and nurses.

Three sisters struggle to reconcile their faith with the world outside the convent.

When the vanished Sister Cecely returns to St. Frideswide's priory with her illegitimate son, her presence forces the nuns to confront doubts about faith, repentance and loyalty—raising tension that may culminate in danger.

Sister Fidelma, a Celtic nun and Brehon lawyer, teams up with Roman Brother Eadulf to solve a murder at a pivotal 7th‑century Whitby synod, amid church rivalry and looming treason.

Like many Catholic girls prior to Vatican II, Mary wanted to be a nun. Ecstatic at her acceptance into a teaching order, she began the period of intense training called "formation," learning the virtues prescribed by a 19th-century, male-dominated Church: humility, self-abnegation, and childlike dependence on the will of her superiors. What happens to a normal 14-year-old girl, giggly and interested in boys, who adores her family yet feels compelled to commit herself to a life that will demand that she never again visit her parents' home? And what leads Mary, "formed" and on mission, to make the decision not to take her final vows? Here, the author invites the reader to enter the world of the young woman who made that journey, to wander the cloistered halls of the convent and experience from the inside the workings of cloistered minds and hearts. Mary Wong interviewed forty former nuns about the experience of convent life, interweaving their stories with hers in a candid, funny, deeply moving account of her training and adventures, and of the beliefs and doubts that persevere.--From publisher description.

Dame Frevisse, a nun, leaves her cloister to chase her outlaw cousin Nicholas up the King's Highway, confronting the law, her vows, and a deadly manor where faith and greed collide.

In medieval Prior Byfield, plague and famine grip the village while a twisted web of adultery, crime, and intrigue threatens its inhabitants. Nuns Sister Frevisse and Sister Thomasine investigate the betrayal that endangers the nunnery and the community.

Sister Fidelma, a sharp‑witted Celtic nun, is called to Rome in 664 AD to investigate the murder of the Archbishop-designate of Canterbury and a theft of valuable relics amid the religious turmoil of Christendom.