I finished this book last night and I really enjoyed the read.
Chapter 8 - A Matter Of Some Gravity was even more interesting that Ch 6. I have always found the Uncertainty Principle applies to my understanding of Relativity. Just when I start to think I have the fundamentals focused in my mind, it all becomes a fuzzy mess again. Averted vision is of no help either. The way that Fred Watson explained Einstein's brilliant theories makes it all seem a bit easier.....relatively.
Definitely worth reading.