I can't recommend this tome (not really; it's not very long, hence not so filling) nearly highly enough. Not the best-written thing per se, but the nuggets it contains are even better than the Mc- kind, shockingly enough. Anyone who cares a whit about their figurative kibble or literal finances owes it to themselves to beg, borrow, or buy a copy. It'll increase your mental FLEX-ability.
Money quote from Charles Kindleberger's Manias, Panics, and Crashes:
Nothing so undermines your financial judgment as the sight of your neighbor getting rich.
If that doesn't sum up the mindlessly envy-consumed, manic-depressive root of all markets, I just don't know what does. As it stands, I may still not know. Just read it now. Und believe me later...