Stephanie Jane Swainston is a British literary fantasy/science fiction author, known for the Castle series. Her debut novel, The Year of Our War (2004), won the 2005 Crawford Award and a nomination for the John W. Campbell Award for Best New Writer.

The fantasy novel The Year of Our War (2004) is the first book by British author Steph Swainston. It is often given as an example of the New Weird literary genre.