The chapter completes previous discussions of readers’ sense of agency (I.3) and sense of presence (II.2) by introducing the sense of flow. Readers’ sense of flow is modelled on Csikszentmihalyi’s notion of the ‘flow channel’, where a trade-off between challenges and enabling factors develops dynamically. The second-order probability design, with its embodied cues, provides a similar environment for readers, creating a sense of flow and readerly pleasure while reading. Through examples from Tolstoy’s Anna Karenina, Spufford’s Golden Hill, and Austen’s Persuasion, the chapter outlines different ways in which the sense of flow can be eased, complicated, and disrupted. It also links to traditional formalist arguments about defamiliarisation in literary texts.