Isaac Newton was a wizard?!* I love that there was a time, only just a few hundred years ago, in which men attempted wizardy-like experiments, working magic if you will, in their attempts to turn lead into gold and what have you. That's awesome.
As a nice "getting to know you" leaping off point, Gleick's book is a good starter bio about Newton's life in general. It gives summary details of his theories and work without bogging the reader down too much. Anyone looking to do a study on Newton will need to dig a bit deeper than this.
* I stand by my comment, because if women could be condemned as witches and put to death for it, grown men who dabble in alchemy, revered as they may be, can and should be made to withstand the "wizard" label, for better or worse.