Focusing on online facilitated child sexual abuse, this book takes a rigorous approach to existing literature to address some of the most pressing public and policy questions surrounding the evolution of online child sexual abuse. The authors provide an unparalleled examination of which children are most vulnerable to this type of abuse, how their vulnerability is made, what they are vulnerable to and how resilience, both human and technical, can be promoted. They also consider the changing nature of child sexual abuse in the digital age and the consequences of this for victims and survivors, as well as for practitioners and policymakers working in prevention and response.