This book is an introduction to economics, intended for students from their first semester onward. The introduction begins with a preliminary course in business administration and economics, guiding you through fundamental questions of our economic system, addressing banks, legal forms of businesses, taxes, and leading you to topics such as managerial control, market failure, adverse selection, and signaling. Contents include: Propaedeutics: Business and Economics. Part I: Fundamentals. Part II: Financing. Part III: Investment. Part IV: Risk. Part V: Business Theory.