Percy, Annabeth, and Thalia are trying to recruit two children of Hades to join Camp Half Blood when a manticore appears and tries to kidnap them. The manticore is forced to retreat when Artemis arrives along with her Hunt, but he takes Annabeth with him. Before he retreated, however, he mentioned a stirring of monsters. Artemis interprets it to be the return of a monster capable of giving someone the power to destroy Olympus, the Ophiotaurus. Worried, she peruses the manticore alone in an attempt to hunt the Ophiotaurus. Once the Campers and Hunters return to Camp Half Blood, a disturbing new prophecy is delivered by the Oracle of Delphi. The questers must save Annabeth and Artemis, but most importantly prevent the Ophiotaurus from getting into the hands of the one Luke is working for.
Excellent continuation of the Percy Jackson and the Olympians series. While all books in the series are good standalone books, with at least one conflict being unique to that book, this is where the set-up for the final conflict starts. I enjoy this because it is fast paced, as well as having an overarching story-line that fits together perfectly.