The growing popularity of fan fiction is increasingly seen as a threat to a copyright owner's economic position and creativity. This article considers to what extent, if any, a person should be able to produce a literary work of fan fiction without infringing the copyright of an original work if that person takes an entire work, but not the exact words and expression, and expands or modifies the perspective, conclusion, settings or characters. The proliferation of fan work raises interesting questions of law and policy that are yet to be substantively raised or considered ( judicially or academically) in the New Zealand context. A comparative analysis with the United States guides the article's consideration of copyright protection, infringement and defences which necessarily leads into a discussion on like-treatment with academic works. It is on the above basis that the article then comes to the conclusion that the theoretical underpinnings of copyright law should be seen as encouraging fan work, rather than preventing it.