Subrahmanyan Chandrasekhar, Nobel Laureate in Physics, was a towering figure in 20th century physics, but remained a highly private man. The many letters and correspondence in this book reveal in Chandrasekhar's own words the depth of his pursuit of science as well as his personal struggles. This book is an important addition to the three previous volumes by Kameshwar C. Wali, including Chandra, A Biography of S. Chandrasekhar, S. Chandrasekhar: The Man Behind the Legend, and A Quest for Perspectives: Selected Works of S. Chandrasekhar (With Commentary), Volumes 1 undefined it is too deep and too all persuasive. Let me then record simply that Lalitha was the motivating source and strength of my life.'This new book adds a significant personal dimension to an extraordinary scientist and will give the public a deeper understanding of the man behind the legend.