Isaac Newton was indisputably one of the greatest scientists in history. His achievements in mathematics and physics marked the culmination of the movement that brought modern science into being. Richard Westfall's biography captures in engaging detail both his private life and scientific career, presenting a complex picture of Newton the man, and as scientist, philosopher, theologian, alchemist and public figure, President of the Royal Society and Warden of the Royal Mint. An abridged version of his magisterial study Never at Rest, this concise biography is now published for the first time in paperback and makes Westfall's highly acclaimed portrait of Newton newly accessible to general readers.