This book is for entrepreneurs starting organizations that will change the world, for managers who want to become more effective, and for students learning about management. A crucial aspect of management is the tools available to assess the economics of organizations. These tools are the purpose of this book. To be effective, you need to understand the numbers. Once you are comfortable with them, then you can build on the insights that will make your organization unique. Too many good ideas to create value for society fail because the people at the helm could not interpret the numbers. You don’t have to be an expert, but you need to feel comfortable with the basics. Relying on finance and accounting guys is good, they will give you more depth; but blindly relying on them is risky. They do not have the whole picture or your vision. So, they cannot interpret the numbers within the right context. The best way to work with these numbers’ people is to have a solid base to ask the right questions and understand the answers.