Transclasses sets out to fill a lacuna created by the impoverished vocabulary of class by theorizing the class identities of "exceptional" subjects who defy the predictions of social determinism and leave their formative social status behind. Terms of stigma - parvenu, careerist, déclassé, class defector - are used to socially shame such subjects, but as Jaquet demonstrates, to hew to these caricatural typologies is to miss out on the power of class transitioning at the microscales of lived experience and in an intersectional frame. If we have been used to thinking, with Althusser, in terms of the reproduction of capitalism, Jaquet goes one further, producing a model of non-reproductive modes of existence that, far from superseding class or ignoring the reproductive drive of capital, expand their conceptual parameters. An experiment in concept-work that draws on self-narration in literature and auto-ethnography (from Stendhal to Richard Wright, Pierre Bourdieu, Annie Ernaux and Didier Eribon), Transclasses will be essential reading for interdisciplinary fieldworkers committed to new lexicons of identity, class struggle and social change.