For John, BLUF: Not everything Amazon sells is good value for money.
About a year ago my wife decided we would take a Fiction Writing Course at UMass Lowell Continuing Ed. Good pick. Among other items, I wrote a short story on Exercise ABLE ARCHER 83, which you can look up on Wikipedia.
So, when a classmate from the course recently mentioned that there was a book out on ABLE ARCHER, I went to Amazon and ordered it. The cost was $19.95. Didn't seem unreasonable.
What a ripoff. The authors, Messrs Jesse Russell and Ronald Cohn copied the above mentioned Wikipedia article, plus Wikipedia articles on NATO, the Soviet RYAN missile warning system and the United States. There are also Wikipedia references and licenses.
So, I basically spent a Double Sawbuck for a nicely printed trade sized version of a couple of Wikipedia articles. But, it is Caveat emptor. I failed to read the fine print on the Amazon page.
So, beware those authors and their house, Bookvika Publishing!
Regards — Cliff