Books like The Roman hat mystery by Ellery Queen

Chief Inspector Nikolai Hoffner, a half‑Jew removed from the Kriminalpolizei, seeks his missing son Georg amid Spain's civil war after losing his elder son to the Nazis.

During a mountain vacation, Ellery Queen and his father are trapped by a forest fire at a remote cabin where a doctor, his family, and unusual guests—including conjoined twins—meet a deadly mystery. Queen must solve twin murders while fending off flames.

When novelist Karen Leith is found dead in her Manhattan home, Ellery Queen investigates a crime that ties her life, her father‑son relationship, and a mysterious family history together.

When a mysterious man is found dead in a hotel anteroom, a wealthy publisher’s social circle becomes a tangled web of secrets, jewels, and stolen stamps. Ellery Queen must untangle the bizarre clues to reveal the killer.

In Ellery Queen’s latest mystery, a summer escape at Spanish Cape turns deadly when a one‑eyed giant kidnaps a heiress and her uncle, leading to a tangled web of blackmail, suicide, and a climactic unmasking of the killer.

When Mrs. French is found dead in her department store’s showroom, Detective Ellery Queen and his father must untangle a web of corporate intrigue and familial secrets to uncover the killer hidden behind the glamorous façade of New York’s most celebrated retail empire.

Ellery Queen and his father investigate the mysterious disappearance of a Greek art dealer’s will, uncovering clues tied to a strangled ex‑convict, color‑blindness, a shredded will, and a tiny typing mistake.

It’s Christmas in Chicago, and Inspector Richard Queen is enjoying a busman’s holiday at a conference on gangland violence—but his son, amateur sleuth Ellery, is bored silly. Until, that is, Ellery reads of an unusual killing in rural Arroyo, West Virginia: A schoolmaster has been found beheaded and crucified. Ellery hustles his father into his roadster and heads east, since there is nothing he’d like better for Christmas than a juicy, gruesome puzzle. When the Queens arrive in Arroyo, they learn that the victim was an eccentric atheist, but not the sort to make enemies. What initially looks to be the work of a sadistic cult turns out to be something far more sinister. In the months ahead, more victims will turn up all over the world—all killed in the same horrifying manner. It will take several bodies before Queen divines the clue that unlocks the mystery of the Christmas crucifixion.