New book on Amiga?

[Piru]

Seems pretty much like a ripoff to me - printing free online content (to which I even might have contributed) into a book and charging 27+ GBP for just 84 pages... Is this legal?

Sure it is legal. It's also highly immoral. Wikipedia can't stop it either.

This issue has been discussed to death couple of years ago already.

Unfortunately Amazon isn't stopping them either.. Well why would they, it's more income to them, too. Couple of links:
http://scholarlykitchen.sspnet.org/2010/04/06/wikipedia-pod-a-flooded-amazon-the-endless-spigot-at-alpha-and-betascript-publishing/
http://www.neowin.net/news/amazoncom-allows-the-selling-of-wikipedia-articles

But sure, if you like to have couple of low quality amiga wikipedia articles in a printed form, go ahead. Just remember than printing them by yourself is probably much cheaper.

[Piru]

It apparently doesn't take much to get a book published.

Anyone can get whatever they want published these days. It's trivial to use Print-On-Demand services bypassing the publisher completely.