Dr SUZANNE FRASER, Lecturer, Monash University, Australia.Dr KYLIE VALENTINE, Research Fellow, University of New South Wales, Australia

'Substance and Substitution is an extremely impressive work of scholarship and a genuine advance on existing studies of methadone maintenance treatment and of drug use more generally. It marries innovative theory with diverse empirical materials, and goes beyond a number of well-established binaries (e.g. resistance/conformity, social/material, body/mind, morality/medicine) in trying to understand the 'co-production' of substance, time, identities and gender.' - David Moore, Associate Professor, National Drug Research Institute, Australia.

• Introduction 1 Substitution, Metaphor and Authenticity 2 Governing Treatment 3 The Chronotope of the Queue 4 Treatment Identities 5 Repetition and Rupture: The Gender of Agency Conclusion: Dependence, Contingency and the Productivity of Problems