Issue Information. "School of hard knocks" - what can mental health researchers learn from the COVID-19 crisis? Annual Research Review: Anterior Modifiers in the Emergence of Neurodevelopmental Disorders (AMEND)-a systems neuroscience approach to common developmental disorders. Issue Information. Editorial: Biomarkers in precision medicine for mental illnesses. Issue Information. Editorial: For crying out loud: Infant signaling and parental responsiveness. Erratum. Issue Information. Is sleep the red flag to psychopathology's bull? Erratum. Issue Information. Editorial: Something special - the scientific challenges of rare risks. Issue Information. Editorial: The role of digital technology in children and young people's mental health - a triple-edged sword? A randomised controlled trial of a relationship-focussed mobile phone application for improving adolescents' mental health. Issue Information. Camouflage and autism. Issue Information. Editorial: Some roads less travelled-different routes to understanding the causes of child psychopathology. Issue Information. Editorial: Polygenic scores in child and adolescent psychiatry - strengths, weaknesses, opportunities and threats. Issue Information. Editorial: The primacy of parenting. Issue Information. Editorial: Something new - what's next for child and adolescent psychiatry? Commentary: Broadening the research remit of participatory methods in autism science - a commentary on Happé and Frith (2020). Commentary: An updated agenda for the study of digital media use and adolescent development - future directions following Odgers & Jensen (2020). Commentary: Ecology momentary assessment as a tool for understanding dynamic patterns in child and adolescent health and development - reflections on Russell and Gajos (2020). Issue Information. Editorial: From risk prediction to action: leveraging electronic health records to improve pediatric population mental health. Oral contraceptive use in adolescence predicts lasting vulnerability to depression in adulthood Issue Information. Editorial: 'People get ready': Are mental disorder diagnostics ripe for a Kuhnian revolution? Commentary: A challenge for a higher bar in research on childhood trauma: reflections on Danese 2019. Preventive intervention for trauma reactions in young injured children: results of a multi-site randomised controlled trial. The role of maternal anxiety disorder subtype, parenting and infant stable temperamental inhibition in child anxiety: a prospective longitudinal study. Prenatal exposure to polycyclic aromatic hydrocarbons modifies the effects of early life stress on attention and Thought Problems in late childhood. Commentary: Do we need new parenting programmes for different cultural groups or should we adapt those that already exist: a commentary on Ward et al. (2019). Less imitation of arbitrary actions is a specific developmental precursor to callous-unemotional traits in early childhood. Toward precision therapeutics: general and specific factors differentiate symptom change in depressed adolescents. Commentary: Enabling efficient and full application of prevention strategies for population mental health - reflections on Dodge 2020. Practitioner Review: Anxiety disorders in children and young people - assessment and treatment. The adult outcome of children referred for autism: typology and prediction from childhood. Mechanisms linking parental educational attainment with child ADHD, depression, and academic problems: a study of extended families in The Norwegian Mother, Father and Child Cohort Study. Annual Research Review: Adolescent mental health in the digital age: facts, fears, and future directions. Reciprocal links between anxiety sensitivity and obsessive-compulsive symptoms in youth: a longitudinal twin study. Harmonizing behavioral outcomes across studies, raters, and countries: application to the genetic analysis of aggression in the ACTION Consortium. Commentary: Microbial panaceas. Does development have the answer? Reflections on Cowan, Dinan, & Cryan (2019). Infant domestic adoption: outcomes at mid-life.