String theory is often called the “theory of everything” because its goal is to describe all the fundamental forces of interaction in the Universe, including gravity, quantum mechanics and relativity. This revolutionary concept represents a new understanding of space and time, and seeks to explain the connection between phenomena such as black holes and quark-gluon plasma, extra dimensions and quantum fluctuations. Despite the complexity of the topic, Princeton University professor Stephen Gubser offers a succinct, accessible, and entertaining introduction to one of the most debated areas of physics today. With a minimum of mathematics, using interesting analogies, the author explains the essence of supersymmetry, duality, and space-time curvature in a way that will be understandable to any reader with secondary school knowledge. While the provisions of string theory have not been fully proven, however, those secrets that have already been revealed to us allow us to admire the harmonious harmony of the universe and discuss the practical application of future discoveries in high-energy physics.