I recently read this book and found it to be excellent. It's the story of how we never stop knowing, how science works (even when it doesn't), how gracefully math can describe the world we live in and more.
The story begins with how Sir Isaac Newton, author of Pricipia Mathematica and holder of the Lucasian Chair at Cambridge, developed math to describe the gravity and the motion of the planets with no need god holding them in place. It moves to the attempt to use those laws to explain the aberration in the orbit of Mercury, the proposal of a planet or body named Vulcan, near Mercury that was causing the irregularity in the orbit, how the hunt for that body proceeded and how, ultimately a leap forward was made by Albert Einstein and others in developing relativity, a far better model that described the universe and propelled up forward.
It's also the story of how we examine ideas, how we are sometimes trapped by our own thinking, the limits of what we can know based on what we can measure and how science is self-correcting, open to inspection and as much art and inspiration as a rigorous process.
It's not a long read (I read it on Kindle), I spent 2 days reading it and plan to read it again, mainly because I read parts of it late at night when I was tired. It's not heavy on math or theory, but it does explain them sufficiently so non-science readers will understand the points.
I highly recommend it.