I found a free ebook for all of you entitled Adsense-Is It Really Worth It?
It's a pretty short ebook so you can read it all in one sitting and it has some good points.
If you are interested in making some extra money with Adsense than this ebook is worth your time. If you are focused on other things than I would suggest you skip it.
Get the ebook here:
Adsense-Is It Really Worth It
Of course if you own a money making blog or website this would be something fun you can offer your readers. It is free afterall.