After arriving at Camp Percy has dreams of Annabeth in great danger while the leader of The Hunters, Zoe, dreams of Artemis imprisoned. Percy and Zoe beg to go rescue their trapped friends but only Zoe, Bianca, Grover and Thalia are chosen to go. Unsurprisingly Percy sneaks along in hopes of saving Annabeth. The group travels across America following in Artemis' trail and run into Luke and his army while fighting off fierce monsters. Luke's army is now being led by a mysterious figure known only as The General.
In the previous book, we learn of a prophecy stating that a child of The Big Three would either save Olympus or destroy it by their sixteenth birthday. Initially, it was thought to be Percy that the prophecy spoke of but when Thalia was revived by the Golden Fleece everything changed. During their adventure, both are tested to see what they will do, especially Thalia who is only a week away from turning sixteen.
This was a great book just like the others, filled with adventure, mythology and mystery. I loved learning more about the prophecy. I also enjoyed the new myths that it referenced.