

Sf for young adults written prior to the rise of the YA term in the 1960s might be more accurately called Juvenile sf (see Children's SF for coverage of earlier forms of what would eventually become YA). The term "Young Adult" only came into common use in the 1960s, and has become primarily a publishing category that influences editing and marketing decisions with young people in mind, though publishers also now cater to the increasingly common adult "crossover" audience for YA.

This problem is more common in the case of late twentieth century books that were originally written for a general audience but are retrospectively labelled as YA, like Orson Scott Card's Ender series, beginning with Ender's Game ( 1985). For instance, Nnedi Okorafor's Binti novellas, starting with Binti ( 2015) have been included on many recommended YA sf lists, but Okorafor insists that they are not YA. The YA label is sometimes applied to any sf with young adult protagonists, but this approach is often problematic. Young Adult or YA sf, like Children's SF, is named for and defined by its target audience.
