I love to read (and watch movies and TV shows) mysteries.
Right now, I have just started one in a series that I have been reading over the last several years (I read a lot of books). The author is Laura Childs, and she has several different mystery series. This one is set in a tea shop in Charleston. They are light, delightful, and fun. Nothing gruesome. This is the list of books from her Tea Shop Mysteries:
https://www.fantasticfiction.com/c/laura-childs/tea-shop-mysteries/
She has another, equally delightful mystery series set in a diner/knitting shop called The Cackleberry Club mystery series:
https://www.penguinrandomhouse.com/series/AOB/a-cackleberry-club-mystery
These particular books are wonderful if you like reading about tea, or knitting, or strong female leads, and friendship. The series all feature a small cast of characters that are in each of the stories, friends and co-workers, or relatives of the main character.
I also love to read (and watch) anything that has to do with Sherlock Holmes.
And we watch boatloads of great mystery series on Netflix. I have found a lot of the non-American shows to be much better than the typical flashy American shows. But I will warn you that some are pretty gritty and gruesome, but some are more like the tea shop stories, fun and light, but still great mysteries. So light, and dark. I like both.
Some of the best ones we have watched over the last few months and years are:
Deadwind (from Finland):
https://en.wikipedia.org/wiki/Deadwind
The Murdoch Mysteries (from Canada):
https://en.wikipedia.org/wiki/Murdoch_Mysteries
Black Spot (from France):
https://en.wikipedia.org/wiki/Black_Spot_(TV_series)
Father Brown Mysteries (from England):
https://en.wikipedia.org/wiki/Father_Brown_(2013_TV_series)
The Valhalla Murders (from Iceland):
https://en.wikipedia.org/wiki/The_Valhalla_Murders
Midsomer Murders (from England):
https://en.wikipedia.org/wiki/Midsomer_Murders