I second Richest Man in Babylon along with The Wealthy Barbar. These books complement each other really well (and overlap quite a bit). Babylon is great for laying down philosophy and presenting financial matters in a way completely independent of time or place. Barbar gets a lot more specific about what you should be doing. The latter is specifically a Canadian book, but I can't imagine the US being so terribly different that it wouldn't apply there. Or for many countries for that matter.