It's a blog! Mainly of book reviews.
Newton is not much less of a cypher to me after reading this than he was before, which is unfortunate, because what I really wanted was insight into his character. I'm left with the impression of a man with a big, fragile ego, much less a scientist in the modern sense than I expected because of his reluctance to publish his results, despite his obvious genius, which has come to shape our modern world philosophically and technologically.
I don't know if Gleick chose not to focus on character or if there isn't much evidence, but if you want the bare facts of Newton's life and what he acheived, then this book will give you them in a compact, digestible form.