The Arts of Disruption: Allegory and Piers Plowman offers a series of new readings of the allegorical poem Piers Plowman: but it is also a book about allegory. It argues not just that there are distinctively disruptive 'arts' that occur in allegory, but that allegory, because it is interested in the difficulty of making meaning, is itself a disruptive art. The book approaches this topic via the study of five medieval allegorical narrative structures that exploit diegetic conflict and disruption. Although very different, they all bring together contrasting descriptions of spiritual process, in order to develop new understanding and excite moral or devotional change. These five structures are: the paradiastolic 'hypocritical figure' (such as vices masked by being made to look like 'adjacent' virtues), personification debate, violent language and gestures of apophasis, narratives of bodily decline, and grail romance. Each appears in a range of texts, which the book explores, along with other connected materials in medieval rhetoric, logic, grammar, spiritual thought, ethics, medicine, and romance iconography. These allegorical narrative structures appear radically transformed in Piers Plowman, where the poem makes further meaning out of the friction between them. Much of the allegorical work of the poem occurs at the points of their intersection, and within the conceptual gaps that open up between them. Ranging across a wide variety of medieval allegorical texts, the book shows from many perspectives allegory's juxtaposition of the heterogeneous and its questioning of supposed continuities.