"The Man Who Knew Infinity: A Life of the Genius Ramanujan" By: Robert Kanigel A biography of one of the most innovative mathematicians of all time traces the

"The Man Who Knew Infinity: A Life of the Genius Ramanujan" By: Robert Kanigel A biography of one of the most innovative mathematicians of all time traces the rise of Srinivasa Ramanujan from his days as a clerk to his collaboration with one of England's greatest mathematicians There is also a movie with this same name. It was good, IMHO.