Garin Dowd (Thames Valley) Percept and Affect in Melville's Pierre, or The Ambiguities The work of Melville is a frequent point of reference for Deleuze and Guattari. His Moby-Dick (1851) gives us one of the most extraordinary examples of becoming, while Bartleby's formula ('I would prefer not to') for Deleuze "annihilates copying". Furthermore, Isabel's murmur in Pierre, or the Ambiguities and Billy Budd's stutter suggest that Melville's work is to be placed in a lineage with other later authors such as Samuel Beckett in creating an affective and intensive language. In this context, in What is Philosophy?, it is Melville who is invoked as an example to prepare the way for the discussion of the percept and the affect. These latter centre on the aesthetic figure rather than the conceptual persona upon which philosophy is convened. Melville is said to be one of the half-philosophers, or acrobats of literature, who, by virtue of their "hybrid genius", succeed in "install[ing] themselves within this very difference" between literature and philosophy. In an aside it is suggested that Melville is one of those who have "written the novel of Spinozism". Accordingly, this paper attempts to follow the acrobatic feats accomplished by Melville in Pierre, or The Ambiguities (1852). If affects are nonhuman becomings, and percepts are the nonhuman landscapes of nature, Pierre proves to be an especially compelling candidate for the title of Spinozan novel. Moreover, because this is a performance at the very limits of the genre of the novelistic, and because it displays a singularly (and notoriously) anomalous quality (in Melville's career, in its place in literary history and in its subsequent critical reception), Pierre offers a particularly appropriate context in which to discuss not only the notions of the half-philosopher, the Spinozan novel and the percept and affect, but also to make some assertions regarding the specificity of literature in relation to Deleuzean philosophy.