Percy Jackson and the Olympians, Book 4.

Percy Jackson thought his freshman orientation would be boring. Then a familiar mortal shows up out of nowherefollowed by demon cheerleaders and suddenly, hes fighting for his life before classes even begin.

In The Battle of the Labyrinththe stakes soar as the ancient Titan lord Kronos gathers his forces for war. Even Camp Half-Blood, once a sanctuary for demigods, is no longer safe. The magical borders are weakeningand the enemy is closer than anyone suspects.

To stop Kronoss army from launching a surprise attack, Percy and his friends must brave the Labyrinth: a vast, ever-shifting maze beneath the mortal world filled with monsters, traps and secrets older than Olympus itself. Every turn brings new dangers, ancient magic and revelations that could change everything Percy thought he knew about his fate.