Fabio Gurgel, more than a multi-world jiu-jitsu champion, is an undisputedly successful businessman, a visionary in his field. In Unshakable: Principles of Jiu-Jitsu Applied to Life and Business, he presents us with his life and business trajectory, showing us how his initial uncertainties and apprehensions, as well as the values he learned on the mat, prepared him for a path of personal and sporting victories. Gurgel is the co-founder of Alliance Jiu Jitsu, which currently has 300 gyms in 29 countries, with a total of around 30,000 students who receive training based on the methodology and values of the team led by Romero "Jacaré" Cavalcanti, Alexandre Paiva and Fabio Gurgel; Alliance has trained dozens of world champions and representatives of the sport all over the world. The success of Gurgel's endeavor is evident, but the question remains: what made Gurgel, based on the principles of jiu-jitsu, thrive and become one of the greatest trainers of jiu-jitsu athletes in the world? Gurgel shows us that it was precisely the principles that Jiu-Jitsu itself taught him from the age of 13, combined with worldviews acquired through studies ranging from Fyodor Dostoyevsky to Ayn Rand, that made him a champion in and out of the ring. Inabalável: Princípios do Jiu-Jitsu Aplicados à Vida e aos Negócios is more than an autobiography, it's a consultancy in book form that aims to pass on the experience and elementary values that formed one of the most successful Brazilian Jiu-Jitsu champions and one of the most respected masters in this field in the world.