Isaac Newton is generally regarded as one of the greatest scientists in history, yet the spectrum of his interests was much broader than that of a contemporary scientist. He was deeply involved in alchemical, religious and biblical studies, and in the later part of his life he played a prominent role in British politics, economics and the promotion of scientific research. Newton's pivotal work Philosophiae naturalis principia mathematica, which sets out his laws of universal gravitation and motion, is regarded as one of the most important works in the history of science. Niccolo Guicciardini's enlightening biography offers an accessible introduction to Newton's celebrated work in mathematics, optics and astronomy and to how Newton viewed these scientific fields in relation to his quest for the deepest secrets of the universe, matter theory and religion. Guicciardini sets Newton the natural philosopher in the troubled context of the religious and political debates that took place during Newton's life, which spanned from the years of the Civil War to the Restoration, the Glorious Revolution and the Hanoverian succession. Taking into account the latest Newtonian scholarship, this fast-paced biography will appeal to all those with an interest in this iconic figure and the great scientific revolution of the early modern period.