She opened a Pandora's box. He has the weight of the world on his shoulders. She felt like she was lost in a labyrinth. It's his Achilles' heel. We're all familiar with these idioms. But where did they come from? Find out with this beautifully illustrated series. Each title tells the tale of a popular Greek myth—perfect guides on the quest for knowledge! Aligned to Common Core standards and correlated to state standards.