A sub-genre of a book is a more specific category within a broader genre, focusing on particular themes, styles, or characteristics. It helps to further classify and identify the content and style of the book for readers who have specific preferences. Examples include sub-genres like dystopian Science Fiction, romantic comedy, or historical fantasy.
The book "John Henry" falls under the genre of American folktales and its subgenre would be specifically categorized as a tall tale.
If you mean by hardstyle the subgenre in electronic music, then yes.
"Eggs" by Jerry Spinelli is a young adult novel that falls under the subgenre of realistic fiction. It explores themes such as friendship, loss, and coping with life's challenges within a realistic setting and narrative.
phycological
Subgenre is one word, however, those who doubt how the word is constructed may use a hyphen.
Jazz
I would say Science Fiction because it is scientifically possible that the world in the future could be like The Hunger Games, but for now it is still fiction.
Nerdcore is a subgenre of hip hop.
nature writing
It's a revenge tragedy.
She contributed to the development of the gothic subgenre
Fiction