Science Fiction - Subgenres

Subgenres

A categorization of science fiction into various subgenres can be problematic, because these subcategories are not simple pigeonholes. Some works may overlap two or more commonly defined genres, whereas others are beyond the generic boundaries, either outside or between categories. Moreover, the categories and genres used by mass markets and literary criticism differ considerably. One example that straddles science fiction subgenres is Elizabeth Moon's Vatta's War series, which has been described by many as military science fiction but also has elements of space opera.