I am looking at the Omnibus 1 program for my ds. We will also attempt to do CC Challenge B at home (not all but using some of the resources). I have TOG but feel like I'm all over the place with it. What exactly is Omnibus? Is it just a guide to the books that are recommended for reading or is it an actual "history" program? I'd love an explanation of how it works before I invest in yet another program.