Isaac Newton
James M. Gleick, Isaac Newton (Vintage Books, 2003)
Summary: A beautifully written biography. Period.
Key Quote: "Einstein did shake space-time loose from pins to which Newton had bound it, but he lived in Newton's space-time nonetheless: absolute in its geometrical rigor and its independence of the world we see and feel. He happily brandished the tools Newton had forged." - pp. 185-86
Bottom Line: Read this book if you want to understand Newton and the times in which he lived, but don't have a lot of time to invest in doing so.