This book is concerned to explore the changing role of the Parole Board across the range of its responsibilities, including the prediction of risk and deciding on the release (or continued detention) of the growing number of recalled prisoners and of those subject to indeterminate sentences. In doing so it aims to rectify the lack of attention that has been given by lawyers, academics and practitioners to 'back door sentencing' (where the real length of a sentence is decided by those who take the decision to release) compared to 'front door sentencing' (decisions taken by judges or magistr.