The Mark of Athena (The Heroes of Olympus, #3)

by Rick Riordan

LEO UNFURLED THE LITTLE STRIP OF PAPER. IT READ: THAT’S YOUR REQUEST? SERIOUSLY? (OVER) On the back, the paper said: YOUR LUCKY NUMBERS ARE: TWELVE, JUPITER, ORION, DELTA, THREE, THETA, OMEGA. (WREAK VENGEANCE UPON GAEA, LEO VALDEZ.)