Book excerpt: This vital, sensitive guide explains the serious issues children face online and how they are impacted by them on a developmental, neurological, social, mental health and wellbeing level. Covering technologies used by children aged two through to adulthood, it offers parents and professionals clear, evidence-based information about online harms and their effects and what they can do to support their child should they see, hear or bear witness to these events online. Catherine Knibbs, specialist advisor in the field, explains the issues involved when using online platforms and devices in family, social and educational settings. Examined in as non-traumatising a way as possible, the book covers key topics including cyberbullying; cyberstalking; pornography; online grooming; sexting; live streaming; vigilantism; suicide and self-harm; trolling and e-harassment; bantz, doxing and social media hacking; dares, trends and life-threatening activities; information and misinformation; and psychological games. It also explores the complex overlap of offline and online worlds in children and young people’s lives. Offering guidance and proactive and reactive strategies based in neuroscience and child development, it reveals how e-safety is not one size fits all and must consider individual children’s and families’ vulnerabilities. Online Harms and Cybertrauma will equip professionals and parents with the knowledge to support their work and direct conversations about the online harms that children and young people face. It is essential reading for those training and working with children in psychological, educational and social work contexts, as well as parents, policy makers and those involved in development of online technologies.