Rule #1 Investing by Phil Town is one of my favorite investment books. I am not completely sold on exactly how he uses the up and down arrows, but everything else seems pretty much spot on. The method and explanations are just so matter of fact. Clear. Simple. Plus he might be right about the arrows.
His matter of fact style is exemplified in this post on finding great companies in an industry (or in this case, failing to find any great companies).
Click here, click there, see this, see that. These companies are all crap, move along.