Book excerpt: Working Together for Children provides an account of the systems and processes of multi-agency work with several groups of children and their families. The key philosophy of the book is that such work is inherently complex, and only by understanding and grappling with these complexities can prospective or practising professionals within children's services contribute really effectively to multi-agency working. This second edition contains updated references to legislation and guidance underpinning multi-agency working, as well as fresh configurations of chapters to reflect new ways of categorising needs of, and organising support for, children in a variety of circumstances. New chapters are included for specific groups of children including coverage of special educational needs and disabilities (SEND) and youth justice. Reflection on practice, to help link policy with practice, is a theme running throughout the book, which uses features to assist the reader including: - information boxes giving further factual details of particular areas related to multi-agency working - reflective exercises including case studies - questions designed to stimulate reflection on issues raised - an appendix providing points to consider and suggestions for the exercises This introduction is for trainee practitioners in childcare or childhood related courses, education, social work, youth work and health care, or for those already working in such settings who are looking to improve their practice.