Explores lessons for business and public sector leaders for surviving and thriving in a complex environment. Contains lessons that are insightful, actionable, and concisely communicable. These lessons are "secrets" not because there is a conspiracy to hide them from public view, by because they are often difficult to grasp in their deep meaning, and challenging to appreciate and act on in combination. Fullan makes these so-called secrets accessible and useful and offers illustrative examples from a variety of businesses, health organizations, and public education systems.