In this foundational text, David Greenwood provides a comprehensive introduction to the principles and practices of action research. This book demystifies the methodology, presenting it as a powerful tool for social inquiry aimed at creating tangible social change. Readers will explore how to collaboratively diagnose problems, implement interventions, and systematically study the outcomes. Greenwood emphasizes the participatory nature of action research, where researchers work alongside community members to address pressing issues. It's an essential guide for students, academics, and practitioners seeking to bridge the gap between theory and practice, using research not just for understanding the world, but for actively improving it.