Half boy, half god—and still managing to stay alive.
Percy Jackson has faced his share of monsters, but now a new threat is rising. Camp Half-Blood is in danger, and the only way to stop the enemy may lie deep within a twisting underground maze. The labyrinth is full of traps, secrets, and creatures best left in the dark. It wasn’t made for heroes—and it certainly doesn’t want them getting out.
With time running out and the Titans on the move, Percy and his friends must face one of their toughest challenges yet. Can they survive the maze—and what waits beyond it? (Book 4)