Being a professional engineer, although retired, I have lots of time to pursue my interest in astrophysics and associated topics. Time, to me, is an extremely interesting topic -- one which we think we all know, but probably know very little about.

Anyway, I had hoped this book would provide a greater understanding of time, and I'm sure it does .. but not for me. All of the material in this book relies HEAVILY on advanced mathematics for understanding -- calculus, differential equations, etc. Unless you are extremely versed and current in advanced math, you will not be able to realize the potential of this book.

I couldn't actually rate the book, as I'm no longer instantly conversant with the advanced math in the book. If one were, then I feel quite sure that this book could be four or five stars. But for a layman, or even one with a history of advanced math which hasn't been used recently, it is virtually not understandable. Too bad.