Peter James in this book tackles the theme of genetic manipulation through a fictional work Although currently science does not practice openly genetic manipulation to create a new "humanity" However it applied to the animals and cloning much more widespread as people think! Who in his wildest dreams, did not imagine the perfect child, beautiful, intelligent, whose genes have been modified so that it is not suffering from a rare disease. The purpose of the author, in my humble opinion, is to demystify the unlimited power of science. And if the man was exceeded by science, if it instead of bringing him the dream kept him in a waking nightmare ............ The interest of the book, notwithstanding the plot well put together, is to ask ourselves a fundamental question: unlimited scientific progress and applied to the human genome lead to immortality or they rush the fall of the human race ..............