The mark of athena

The Mark of Athena is an upcoming book by Rick Riordan. It is to be released fall 2012, and it follows the adventures of the 2nd great prophecy. The Greek and Roman demigods must unite to defeat the giants, the sons of gaea - in Rome. Percy Jackson, Jason Grace, Hazel Levesque, Annabeth Chase, Frank Zhang, Piper Mclean and Leo Valdez must close the doors of death, and save Nico de Angelo who has been taken captive by gaea. Ella the harpy recited this prophecy in The Son of Neptune: Wisdom's daughter walks alone, the mark of Athena burns through Rome. The meaning of this prophecy is unknown, but one thing is for sure, Annabeth is to play an important role in this book, as stated by Juno in The Son of Neptune. The Mark of Athena is the third book in the Heroes of Olympus series. It was proceeded by The Son of Neptune.