Are there any novels with sad endings?

There were, for example,"Book Traversing the Interstellar Era,""Immortals Enter the Mortal World, Elegant Gentlemen Are Not Escaped,""Female Ghost Hunter," and so on. But at the same time, there were also novels with happy endings, such as "The Evil Emperor's Worm Queen" and "Coincidentally Missing and Meeting Again". Different storylines had different endings. I hope you like this fairy's recommendation. Muah ~😗