Ancient Greece Study

I've decided to take Sam on a journey through ancient Greece. I was inspired by the plan at Mater Amabilis, though they start with ancient Egypt. The thing is, I have all but one of the books for ancient Greece, so the purse wins and I spent a mere $5 on the one other book I need. Of course I "want" the Usborne Encyclopedia of the Ancient World, but I need to wait for an extra $40 to fall in my lap first.