My vote would be to check out the free videos on Youtube for starters. One channel in particular has been helpful to me. SFLogicNinja goes over quite a few different topics in detail. Start there and see if he gives you what you need.
In fact, if there's something you're trying to figure out in Logic, I've had good success looking it up in Youtube and finding something that helps.
macprovideos.com and groove3.com are both great. I would start with groove3 and then "graduate" to macpro as there's probably some crazier more advanced stuff there. Also, just rent them as that's by far the best bang for the buck.