This document provides an introduction to Appreciative Inquiry (AI), which is an approach to organizational change that focuses on an organization's strengths and positive aspects. The document defines AI, outlines its core principles such as constructionism and the positive principle, and discusses its benefits like being participatory and focusing on the positive. It also notes some criticisms of AI and provides examples of tools used in AI like the 4D framework of discovery, dream, design, and deliver. Throughout, the document emphasizes AI's asset-based and strength-focused approach to change as opposed to identifying problems.