This is a new publication of Louis de Broglie's book "New Perspectives in Physics." The very informative Foreword by Aurélien Drezet makes the book even more valuable. This is a unique book. One of the founding fathers of quantum mechanics writes about the story of the advent of quantum mechanics in great detail, about his discussions with Einstein on the interpretation of quantum mechanics, about the history of science, about great French scientists and about other important subjects such as scientific education and popularizing science.