The Mark of Athena (Fan-Fiction)

{completed} ✓ [UNEDITED. I highly recommend that you DO NOT read this. Thank you.] Six months ago, Percy Jackson, savior of Olympus, vanished from Camp Half-Blood. Hera was making a gamble with Jason Grace. The two leaders traded places by acting as the leaders. Now it's June. Annabeth, Jason, Piper, and Leo are flyi...