What is a good way to refer to stories that are meant for adults?
There are stories for children and for adults. But when I say "adult stories" people tend to think they are erotica/porn stories.
What is a good way to refer to adult stories?
Example of adult stories: Lovecraft's, Poe's, Kafka's, etc.
Solution 1:
It depends on your audience: if you're talking to children you could say "stories for grown-ups", and if you're talking to teenagers or adults you could follow GBackMania's advice and use "for {age} and older".
Solution 2:
You are right, the word adult has come to have an erotic connotation. You might want to use mature, advanced, or even sophisticated.
Solution 3:
What about "general fiction"?
Solution 4:
Use "Stories for adults".
Google this phrase and you will notice that the most of the results are not about erotic stories. For example:
Bible Stories for Adults
Scary Stories for Adults
Christmas Stories for Adults
But if you google "adult stories", then most results are erotic stories or porn.