DennisN said:
Regarding those books, I have only read "A Brief History of Time". Twice. I enjoyed it.
I have read it twice, also. The first time in my late 20's, and the second in my late 40's.
The first time, it was almost more than I could absorb, as I got to the last 1/4 of the short book. A lifetime later, after many magazine, documentary, and Science-Fiction shows under my belt, it made sense.
As a layman, I can not assess if it should be listed as educational, or entertainment reading. It certainly is NOT a technical manual or textbook, in any strict sense of the meanings, but I can tell you that it helped me get over the conceptual hurdles of how black holes work.
For me, it was both entertaining, and educational, and laid the groundwork that has allowed me to keep up (or at least quietly follow along) with topics that my formal education never even broached.
Since then, I have come to enjoy spotting Stephen Hawking, in celebrity situations, such as an episode of Star Trek TNG. To me it is amazing the brain that resides in that head.