The book is dedicated to the scientific, pedagogical and social activities of one of the most prominent personalities in physics of the 20th century. French theoretical physicist, Nobel laureate Pierre-Gilles de Gens, most widely known for his work in the field of condensed matter physics. De Jeune was not only a gifted scientist, he showed outstanding abilities in organizing science, was an excellent lecturer, many of his scientific works became classical and translated into other languages ​ ​ of the world. The scientist traveled around the country with lectures for schoolchildren, was interested in fine art, painted well, and in the last years of his life he mastered painting. The personal memories of the author and de Jin's closest colleagues, as well as rich illustrative material, give the book a special flavor.