What is "subgenres"

Usage examples of "subgenres".

Most genre writing can in actuality be broken down into several subgenres to further compartmentalize and satisfy the avid reader.

Name any of the now-recognized subgenres or themes of science fiction and trace them back in time .

There's nothing wrong with either of those subgenres either, but what I miss is the thoughtful speculation that went into those hard sf books -- the real science.