Abstract
Spoilers provide advance knowledge of crucial facts about how a work of fiction unfolds or ends. This is often the reason given for our dislike of spoilers. I begin by showing that on generally-accepted philosophical accounts of fiction and imagination, the phenomenon of spoilers is puzzling, and the lay explanation of our dislike of spoilers is inadequate. To resolve the puzzle, I first argue that imaginings are inherently constrained, or norm-governed. In imagining, we take on a (fictional) doxastic role: our aim is to imagine that which a work of fiction presents as true at each stage of its unfolding. Then, distinguishing between two ways in which we can follow norms or rules, I show that although spoilers do not completely thwart our experience of fiction, they can significantly diminish the degree to which we are engrossed in fiction, hence we dislike them.