[iansales]

Science fiction is a modernist genre, fantasy and horror are both fantastic. Crossovers between mainstream (often so-called "literary") fiction are often called magic realism. Science fiction works presented as mainstream are usually done so because the author does not identify as a science fiction writer - Anthony Burgess, Cormac McCarthy, Thomas Pynchon, Michel Chabon, etc. Some authors make the leap from science fiction to genre, such as William Gibson, but their novels are no longer obviously sf. There are no mainstream-sf crossovers as such.