Books like Treacherous is the night by Anna Lee Huber

Quinn Marriott is summoned to find reclusive Julia Stewart, having once shared a deep, forbidden connection with her. Years later, he learns she has a hidden secret—her son Jake—while their unresolved feelings risk opening old wounds again.

In London, 1888, former adventuress Veronica Speedwell and naturalist Stoker Templeton‑Vane investigate the mysterious disappearance of archaeological photographer John de Morgan, unraveling a deadly curse tied to an ancient Egyptian sarcophagus.

"Lady Adelaide Compton has recently (and satisfactorily) interred her husband, Major Rupert Charles Cressleigh Compton, hero of the Somme, in the family vault in the village churchyard. Rupert died by smashing his Hispano-Suiza on a Cotswold country road while carrying a French mademoiselle in the passenger seat. With the house now Addie's, needed improvements in hand, and a weekend house party underway, how inconvenient of Rupert to turn up! Not in the flesh, but in - actually, as a - spirit. Rupert has to perform a few good deeds before becoming welcomed to heaven - or, more likely, thinks Addie, to hell. Before Addie can convince herself she's not completely lost her mind, a murder disrupts her careful seating arrangement. Which of her twelve houseguests is a killer? Her mother, the formidable Dowager Marchioness of Broughton? Her sister Cecilia, the born-again vegetarian? Her childhood friend and potential lover, Lord Lucas Waring? Rupert has a solid alibi as a ghost and an urge to detect. Enter Inspector Devenand Hunter from the Yard, an Anglo-Indian who is not going to let some barmy society beauty witnessed talking to herself derail his investigation. Something very peculiar is afoot at Compton Court and he's going to get to the bottom of it - or go as mad as its mistress trying"--

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

Set in spring 1937, Maisie Dobbs returns to Britain only to find herself entangled in a murder investigation and political intrigue in Gibraltar amid the Spanish Civil War refugees.

In Jack Higgins’ gripping thriller, Alexander Kurbsky, a former Russian paratrooper turned writer, plans a daring escape to the West with Chris Ferguson, Sean Dillon, and an unlikely group known as the "Prime Minister's Private Army," while facing Moscow’s ruthless security services.

When his wife, psychologist Susie, is arrested after a client’s murder, husband Lachlan must uncover a web of secrets to prove her innocence.

Milo, a devoted woman sleuth, travels to Paris to uncover the sinister murder of famed perfume magnate Amory, whose imminent fragrance launch has attracted ruthless rivals and greedy heirs brashly fighting for his empire.

Amory Ames, a stylish detective, works with her husband Milo to solve a jewelry theft and a murder at a masked ball in 1930s London.

Fear drove her on -- a life was at stake! Breathlessly Beth stumbled through the rainy night toward the rendezvous point. This was her last chance to lift the shroud of secrecy from her husband's disappearance, and the cold voice on the phone had warned her not to be late. Ahead of her sat the ghostly shape of an abandoned car. Suddenly both headlights flared on, blinding her. Hands seized her and a scarf was stuffed into her mouth as a gag. Terrified, she felt herself being lifted off the ground. She was being kidnapped!

During the Victorian era, Inspector Witherspoon suspects a murder victim’s young housekeeper, but Mrs. Jeffries, the Metropolitan Police’s housekeeper, unravels the true perpetrator amid intrigue and a cold‑blooded crime.

Amory and Milo Ames investigate a decades‑old murder that resurfaces when socialite Isobel Van Allen returns to her former country house to publish a scandalous sequel, forcing the detectives to untangle a web of lies and uncover the killer.