[Mr. K]

do you know of any good biographies of Newton?

[samtheman]

I’ve read several in my life, don’t remember which ones... but here’s a good documentary: https://www.youtube.com/watch?v=7n3RWAIlzAI

[dr_lew]

do you know of any good biographies of Newton?

Richard Westfall's Never At Rest seems to be the definitive version. I have the abridged Canto version entitled The Life of Isaac Newton, which has served me well, although I have consulted the original for its discussion of some mathematical details.

I also have James Gleick's ISAAC NEWTON, which is comparatively a breezy read, but not without merit, and I would certainly recommend it as a starting point.