The $100 Startup is a practical and motivating guide that shows how you can turn your passion, skills, or ideas into a profitable business—often with little to no money. Chris Guillebeau shares real-life case studies of people who built successful ventures starting with $100 or less, breaking down how they found their niche, attracted customers, and grew their income. The book teaches you how to identify opportunities, test your ideas quickly, and focus on what truly works. Easy to read and packed with actionable insights, it removes the fear of starting small and encourages you to take the first step. Whether you're looking for a side hustle or a full-time business, this book provides a clear roadmap to financial independence.