Heroes of Olympus The Mark of Athena #3

After spending months apart, demigods Percy and Annabeth are finally reunited, along with their friends - Frank, Hazel, Jason, Piper and Leo. Seven heroes bound together by a terrifying prophecy that threatens them all. Now the heroes must work together to retrieve the Athena Parthenon - a powerful and sacred statue of the Greek goddess, closely guarded by and old and terrifying enemy. But failure means putting all of humanity at risk…

They’ve already saved the world once…Twice shouldn’t be a problem, right?