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Summary

kidangel
The Heroes Of Olympus The Mark Of Athena By Rick Riordan is about closing the doors of death in order to save the demigod's camps camp half blood and camp Jupiter ,both a place for demigods. they are opposite counterparts of each other. one is the Roman way and the other way Greek. They must stop Earth mother Gaea's forces from entering into the human world. but seven demigods must work together. but there are only six. who is the seventh one? the prophecy will still remain a mystery