The Change Book: How Things Happen, authored by Mikael Krogerus and Roman Tschäppeler, is a concise guide to understanding the process of change. The book presents 50 models for change, ranging from simple to complex, and explores the factors that influence successful change. Each model is accompanied by a clear explanation and practical examples, making it easy to apply the concepts to real-life situations. Whether you are looking to drive change within your organization or make personal changes, this book provides a valuable toolkit for understanding and implementing change effectively.