I just finished Isaac Newton, by James Gleick. Gleick writes with exceptional grace; the book is small; the notes are entertaining and unobtrusive; and the subject is fascinating: all that commends the book.
There’s never been anyone like Isaac Newton. He claimed, famously, insincerely, in language that Gleick shows most entertainingly to have been plagiarized from one of several contemporary sources, that if he saw farther than other men, it is because he “stood on the shoulders of giants”. But the truth is that lots of Newton’s predecessors and contemporaries had climbed onto those same shoulders, and none saw what Newton saw. They couldn’t have, because it wasn’t there until Newton put it there. He didn’t “discover” gravity; he invented it. He invented the term and the concept that the term referred to, and to make the concept work, he had to invent the concepts of “space”, and “mass”, and “time” (at least in our modern sense of the term—a precisely, minutely measureable succession of moments), along with the method of the calculus to do the necessary math.