Books like Case of the Missing Marquess by Nancy Springer

When eccentric millionaire Samuel W. Westing dies, sixteen heirs race through riddles, blizzards, burglaries and bombs to solve his will and claim a mysterious $10 million inheritance.

Hercule Poirot boards Le Train Bleu for a quiet trip to the Riviera, only to investigate the murder of American heiress Ruth Kettering in her luxury compartment.

Ten‑year‑olds Petra and Calder tackle a mysterious art heist when a Vermeer vanishes, using their unique skills to solve a cross‑continental scandal.

Enola Holmes finds her mother missing and heads to London, where she joins forces with a young marquess in a rescue mission while evading her brother Sherlock and uncovering clues to her mother's disappearance.

A gripping teen mystery where London is terrorized by murders echoing Jack the Ripper, and a group of school kids take on the challenge of tracking down the killer while confronting chilling supernatural forces.

The Marquess Dryden is a ruthless aristocrat whose heart is thawed by the spirited heiress Lisbeth Redmond and her witty companion Phoebe Vale, sparking a perilous romance that could restore his legacy or destroy it.

When her mother vanishes, Enola Holmes races to London, where she uncovers a kidnapped marquess, deadly villains, and a tangled web of clues that could explain her own disappearance.

The Wednesday Wars, a coming-of-age story set in 1967 Long Island, revolves around the third grader who finds himself in seventh grade and the family business that puts him under the microscope.

In his wickedly brilliant first novel, Debut Dagger Award winner Alan Bradley introduces one of the most singular and engaging heroines in recent fiction: eleven-year-old Flavia de Luce, an aspiring chemist with a passion for poison. It is the summer of 1950--and a series of inexplicable events has struck Buckshaw, the decaying English mansion that Flavia's family calls home. A dead bird is found on the doorstep, a postage stamp bizarrely pinned to its beak. Hours later, Flavia finds a man lying in the cucumber patch and watches him as he takes his dying breath. For Flavia, who is both appalled and delighted, life begins in earnest when murder comes to Buckshaw. "I wish I could say I was afraid, but I wasn't. Quite the contrary. This was by far the most interesting thing that had ever happened to me in my entire life."To Flavia the investigation is the stuff of science: full of possibilities, contradictions, and connections. Soon her father, a man raising his three daughters alone, is seized, accused of murder. And in a police cell, during a violent thunderstorm, Colonel de Luce tells his daughter an astounding story--of a schoolboy friendship turned ugly, of a priceless object that vanished in a bizarre and brazen act of thievery, of a Latin teacher who flung himself to his death from the school's tower thirty years before. Now Flavia is armed with more than enough knowledge to tie two distant deaths together, to examine new suspects, and begin a search that will lead her all the way to the King of England himself. Of this much the girl is sure: her father is innocent of murder--but protecting her and her sisters from something even worse....An enthralling mystery, a piercing depiction of class and society, The Sweetness at the Bottom of the Pie is a masterfully told tale of deceptions--and a rich literary delight.From the Hardcover edition.

When cousin Salim vanishes from the London Eye, siblings Ted and Kat team up to unravel the mystery, chasing clues across London while Ted’s unique mind offers the unexpected key to solving the disappearance.

Lady Belle was in a terrible bind after her father passed away and her loathsome stepbrother gained control of her money. Her only hope lay in a cousin in France, but when she signed on as a governess to make the trip, she soon found herself falling in love with a handsome marquess!

In the Regency era, a young noblewoman is forbidden from seeing a charismatic marquess, but their secret attraction forces her to question long‑established family feuds and forbidden desires.