If you do, then you can give it away free, because their book is under the Creative Commons Attribution/ShareAlike license, being a modification of Wikipedia.
The real question in my mind is whether the book provides attribution to Wikipedia as the source. If not, and if the book's contents are literal copies of the wikipedia article, then Wikipedia may be able to have the book(s) taken down because the attribution clause was violated (and thus the license). I've not looked into the Amazon listing enough to know whether that's the case or not.
The cover art for each of these books shows a "content from Wikipedia" badge, so it looks like they are probably conforming to the licenses.
It's a little odd that they'd state it so clearly on the cover, though, since it seems as though they're trying to exploit a knowledge gap in their target market.
Did you actually use the link? In the description there is: "High Quality Content by WIKIPEDIA articles!" (emphasis not mine). That'll probably count as an attribution.
