What is the point of these posts? They aren't reviews. There isn't any commentary. Just a half page from a book. For all we know that half page is the best half page in the whole book. But we don't know that because the author of the post provides no commentary.

Actually there is commentary.

Where?

There is? Where? All I see is a half page of a book that links to Amazon so I can buy it.

<a href="http://www.merriam-webster.com/dictionary/juxtaposition" rel="nofollow" target="_blank">http://www.merriam-webster.com/dictionary/juxtaposition</a>
: the act or an instance of placing two or more things side by side; also : the state of being so placed

The commentary is in the juxtaposition of the headline and image.

The headline promises to tell you "How to Transform a Cell Phone Camera Into a Shield"
And then the excerpt from Glenn's book explains how to do that.

What additional extraneous commentary from me was needed?

Sounds like you're rationalizing an excuse for not spending any actual effort at writing.

As for the headline, when I read that I expect to see an article with some instructions. "How to" has certain implied meaning.

I prefer when person can get their point across with fewer words. Most writers use way too many words simply because blog space is cheaper than ink use to be. It's a shame.

Thanks for getting it, Jmarie. It's one of the big writing lessons so many don't get today. I have PJ's founder Roger L. Simon to thank for teaching it to me.

It requires actual effort to understand when to write less instead of more.

Deploy this in Syria immediately. I also recommend it for animals who invade convenience stores on youtube... oh, wait.