How meeting Percy Jackson shaped a generation of tween adventure books AND What the jewelry of the Greek and Roman gods might have looked like   I’ll never forget the first time I read Percy Jackson and The Lightning Thief. Oh, I loved that scene in the museum where everything goes wrong and the hero side of an awkward kid emerges with lots of magic and mythological characters coming to life. And the fact that the story continued with other novels and took us through all kinds of adventures meeting making real and mythic history come to life was so…