Fictions are credited with a significant power to change our attitudes and behaviours. But do they actually have such a power? What precisely can they do? And what role does imagination play in that? In this paper, I address these questions drawing on some important studies on the psychology of fictional engagement, which go under the label of ‘transportation studies’. These studies, I argue, show that fiction’s influences are made possible by some basic features of our cognitive architecture, such as the capacity that imagination has to interact with our emotional system, on the one hand, and some standard mechanisms of belief formation and revision, on the other hand. From this discussion I also draw a more general methodological lesson c...