Science fiction is a genre that incorporates scientific elements and includes speculative scenarios that, however improbable, could exist. Science fiction is at times hard to distinguish from fantasy, but the main difference is that the supernatural aspects of fantasy could not be explained by science.
Scientific and technological details are an important frame for these works. Science fiction worlds can be set on Earth or in space. The tone and mood run the gamut, with postapocalyptic/dystopian fiction presenting dark, scary predictions about the future. At their core, science fiction books pose "what if" questions about the effect of science and technology on society, and present possible scenarios set in an alternative past or in the future.
The science fiction subgenres seen here reflect most, but not all, of what's being published today. Book Country's genre map will continue to change as new literary categories emerge and others fall out of fashion. If you write science fiction, explore the different subgenres to connect with other like-minded writers, workshop, and publish your book.