The book "Law of Startups in Brazil and The World" provides an overview of the main laws and regulations that directly affect those who intend to undertake in the field of technology. Legal and bureaucratic themes are exposed, not only encompass the opening, but also all the important phases for the survival of the companies. The Marco Civil da Internet, Marco Civil das Startups, the General Data Protection Law, as well as its similar in other world economic centers, such as the United States and Europe, are described here in a succinct and clear way, so the entrepreneur can stick to what truly matters.