This is a faithful publication of the original John Nash Econometrica articles on game theory, as well as contributions by Harold Kuhn, Sylvia Nasar, and others that review Nash's work and his struggle with schizophrenia. It has a new retrospective introduction by John Nash well worth reading for his insights. In case you have been captivated by "A beautiful mind", and be disposed to know more about the controversial existence of John Nash, pick up this book, that surely will catch your entire attention.