The nature and incidence of the misuse of substances are a source of increasing concern within our society. The debate about the appropriate response to that misuse often only considers the user of that substance. This work concerns the impact that misuse has on the children who live with the user, who are so often the forgotten population in the substance misuse system. Studies suggest that for the majority of local authorities substances are an integral factor in over a third of child protection cases and an increasing number of family support referrals. This significance is not reflected in the scant literature regarding parental substance misuse, in particular the impact of parental and sibling drug misuse on children themselves. This book brings together the work of researchers and practitioners who have developed services that can help us improve our response to these children.