Percy Jackson does not expect Freshman Orientation to be fun. However, when a mysterious mortal person enters the campus followed by demon cheerleaders everything goes from bad to diabolical. The war between the Titans and the evil lords Kronos is coming close and there's hardly any time left. Camp Half-Blood is more vulnerable now as Krono's army prepares to invade them.
Percy and his friends set out thorough the Labyrinth which has stunning surprises at every turn. Humor and hardcore action are probably what make this novel the most thrilling one of the series.