‘The Raw Shark Texts’ by Steven Hall seems to mesh with your description, the Wikipedia plot summary states:
The plot of Jaws is referenced extensively and fully acknowledged by the characters in the book, who view it through the device of the conceptual becoming real. The climax of the novel follows the events in the film in detail, highlighting the sense ...
Throne of Glass, by Sarah J. Maas
Quotes from the Fandom wiki's plot summary/synopsis, and are [sic] as I copy-pasted.
Name glossary for the below, because YA names are weird:
Celaena Sardothien is the main character
Prince Dorian Havilliard is the prince
Captain Chaol Westfall is the captain of the guard
Cain is the massive guy
The main character is a ...
This matches in almost every detail ‘The Lost Sanjak’ by Saki, published in Reginald in Russia and Other Sketches (1910).
“a man (a journalist?) visiting a prison inmate”
The prison Chaplain entered the condemned’s cell for the last time, to give such consolation as he might.
“He was incarcerated for a crime he did not commit”
“In ten minutes’ time I ...
This sounds like Observatoriet by Mats Söderlund, published in 2013 by Albert Bonniers Förlag. The Nordin literary agency blurbed the books as follows:
The Observatory is a merciless novel that gets under the skin and lingers on the mind for a long time.
Erik is alone in the mountains on a scientific mission to observe and record the wind, the air pressure ...
This is very reminiscent of a passage in the middle of Chapter V of Bel-Ami (admittedly a short novel, rather than a short story). This can be found on page 182 in the version of “La Bibliotheque Électronique du Quebec” which is available online.
Et Duroy, pour la première fois, songea à tout ce qu’il ne savait point dans la vie passée de cettefemme, et il ...
Are you sure that it was an Agatha Christie story?
Anne Perry's murder mystery Weighed in the Balance (2010) features a murder using the water of lily-of-the-valley. From this summary:
I found this from the comments on this blog post "Q and A: Lily of the Valley Poisoning", but was unable to find any mention of lily-of-the-valley being used as a ...
With so little to go on, it is difficult to be certain. It is possible that the person in question was a Consul General at Large of the United States.
The published poem gives his location as Washington DC. which makes the diplomatic George H Murphy the more likely candidate of those individuals thrown up by internet searches.
This reference to him in a List ...
I have found the following stories by Maupassant that are situation during the Franco-Prussian war:
Le Mariage du lieutenant Laré, published in 1878; see "Le Mariage du lieutenant Laré" on Wikisource,
La Folle, published in 1882; see "La Folle" on Wikisource,
L'Aventure de Walter Schnaffs, published in 1883; see "L’Aventure de ...
I think I’ve found this. ‘Lily Alone’ by Jacqueline Wilson.
Pulling quotes about the book from various sources:
Lily, Bliss, Baxter and Pixie run away to the park and camp out in a hollow tree which Bliss found. JaquelineWilson.fandom.com
They feed themselves by stealing leftover food from a nearby cafe.
The story ends, sadly, with Lily drawing ...
I’ve no great certainty about this, but ‘Stasiland’ by Anna Funder may fit the bill.
Stasiland by Anna Funder is a book published in 2003 about individuals who resisted the East German regime, and others who worked for its secret police, the Stasi. It tells the story of what it was like to work for the Stasi, and describes how those who did ...
'They Loved to Laugh' by Katheryn Worth appears to have all the features mentioned.
16-year-old orphan Martitia Howland has been transplanted into a Quaker farm family of five intimidating sons and one disapproving daughter. As Martitia runs their gauntlet, she suffers their teasing but finally begins to bloom. Valiantly she acquires the ...