This edited collection focuses on children's and young people's (aged 0-25) emotions in policymaking and professional practice. It explores diverse kinds of policy and practice: from governmental policies to informal education, psychotherapy to volunteering schemes. It covers multiple substantive issues: from youth offending to nature, and from military recruitment to suicide. Critically, however, given a surge in interest in emotion, affect and feeling across several socialscientific disciplines over the past decade, the book examines the many ways in which emotions matter within these diverse contexts and forms of intervention. The chapters explore diverse forms of emotion and emotion work, including: emotions experienced during the course of professional interventions; emotions underpinning and evident (or overlooked and absent) in policy-making for children; management of young people's emotions as part of professional practice; the use of emotion to justify particular moral or political imperatives. Each chapter draws principally upon research by academics, taken from various international contexts and academic disciplines. Grounded in and developing recent theorisations of emotion and affect, the chapters draw upon rich, original empirical materials. The chapters also tease out ways in which emotions 'make space'-how emotions constitute, and are constituted by, a range of scales, places, geographical contexts, mobilities and boundaries. Finally, each chapter ends with a short bulleted list indicating key implications for policy-makers and professionals working with children and young people. They are not intended to serve as 'recommendations', rather as pointers to critical themes for consideration by those working or engaging with children and young people.