Readers who appear to be lost in a storyworld, members of theatre or cinema audiences who are moved to tears while watching a performance, beholders of paintings who are absorbed by the representations in front of them, players of computer games entranced by the fictional worlds in which they interactively participate - all of these mental states of imaginative immersion are variants of 'aesthetic illusion', as long as the recipients, although thus immersed, are still residually aware that they are experiencing not real life but life-like representations created by artefacts. Aesthetic...