This book provides a timely discussion of the creative practices in fandom and media culture. Within their participatory cultures, fans produce a wealth of content, data and materials. They write fan fiction, curate wikis and design costumes. This international collection offers a diverse exploration of contemporary fan practices through different cases, such as Yuri!!! On ICE, Harry Potter and Mass Effect. This book reveals how expression, emotion and agency are central to fan activity. Fans are highly adept at transmedia, as well as the critical use of different media and platforms. Fandom can apply to wider concepts within new media, the humanities and design, as the authors in this collection show. They also rely on different approaches, ranging from textual analysis to different forms of ethnography. Overall, Affect in Fandom offers a deliberately diverse exploration of exactly what contemporary fans create and curate, and how.