One of the greatest schools of development in the world has always been adversity. The Son of Crisis tells the story of a young man who, from scratch, built a company that now operates in 41 countries around the world. Marco Stefanini's journey, as well as the company he created, symbolizes the human ability to learn from every difficulty, whether it be economic or personal, imposed by governments or competitors. Stefanini began his professional life in 1984 during the biggest economic crisis Brazil had ever experienced. Throughout his company's history, he has faced inflation, established competitors, technological changes, different cultures, and other barriers. But at each stage and with each challenge, there was also a learning opportunity and a chance for growth. This resiliency is put to the test during the global pandemic, which confirms the ability that Stefanini's company has to reinvent itself and grow, even in the most adverse scenarios. For all these reasons, this is not just a book about an entrepreneur or the technology market. It reveals something about the nature of human beings, their limitations and possibilities. It is a window into the story and profile of every Brazilian entrepreneur.