I found this free eBook through my favorite membership site. Anyway the author is giving them away free at http://www.contentcomposer.com/blog/ the ebook is at the bottom of the blog page.
Review:
This ebook was full of useful things one can do to keep his/her place in Google using good SEO tactics and avoiding the quick dollar tactics of the past which are being "programmed" out of Google's algorithms.
It comes with access to a downloadable free article comparison tool. I’ve “mildly” checked it. I am not convinced it is good or bad. It seemed to call some lines that were exactly the same different because of coding (cgi, html, etc) marks. Those markings were the same in both documents. However, if two articles with no coding are compared, it seems to do a better job.
Over all, I loved this ebook despite the heavy advertising in the end, but then again it's free
Faith