'Altogether, this book should be considered an indispensable acquisition for any intelligent reader's bookshelf …' Webb Society Quarterly Journal '… provides a masterly, well-documented summary of contemporary views of all the many facets of Newton's astoundingly wide-ranging career … and will be essential reading for aspiring Newtonian scholars.' Marie Boas Hall, Nature '… Westfall has organised his enormous task beautifully and done our most elusive worthy proud.' M. Ratcliffe, The Times 'That this is the best biography of Newton is easily and truthfully said … surely no one is going to repeat Westfall's immense and shrewdly conducted task in this century at least.' New Scientist