"Written from an insider's perspective and providing vivid examples from fan artifacts, Textual Poachers offers an ethnographic account of the media fan community, its interpretive strategies, its social institutions and cultural practices, and its troubled relationship to the mass media and consumer capitalism."
This is the best source for fan culture theory. Very well written and easy to understand. Plus everyone cites it, you should too. The section I focused on dealt with the creation of meta-texts based on primary sources of fan interest in the media. This is just one of the many charachteristics of fandom Jenkins defines.