Benoit Mandelbrot surprises us once again with a new fractal, his recent book “The (mis)Behavior of Markets”. Indeed, the contents of the book are themselves organized in a fractal way. While some ideas are repeated a number of times, such as, for example, the analysis of the evolution of cotton prices, others, particularly those whose genesis is not directly attributable to Mandelbrot, are hardly mentioned. Entries in the bibliography have the same characteristic. Mandelbrot’s works appear in abundance, while the rest of references are rather scarce. The fractal structure of the book, far from diminishing its quality, makes it both original and provocative, as is usually the case with the works of this versatile and unique scientist.