At some point, every science fiction and fantasy story must challenge the reader's experience and…

At some point, every science fiction and fantasy story must challenge the reader's experience and learning. That's much of the reason why the genre is so open to experimentation and innovation that other genres reject--strangeness is our bread and butter. Spread it thick or slice it thin, it's still our staff of life.

Orson Scott Card

How to Write Science Fiction and Fantasy