As I have aged, there were times when I wondered, "Is this normal? Or is something wrong?" You can't get a straight answer from a doctor. If you know enough old people, you can do an informal survey to come to your own conclusion. Or you can read this book. I found the book refreshing, informative, and yes, even reassuring. It talks about How We Age -- what, why, and how the process happens to all of us who live long enough.
But that is only the beginning, as there are excellent chapters about making choices, and for lack of a better description, how to age gracefully and get the most out of life. The latter is discussed with a view toward living an active life, followed by a short period of decline before death. There is so much useful information that, a year after reading this book, I am about to read it again just to refresh my memory. This should be required reading for anyone on the high side of 50, or for anyone who loves someone on the high side of 50.