Percy Jackson isn't expecting freshman orientation to be any fun. But when a mysterious mortal acquaintance appears on campus, followed by demon cheerleaders, things quickly move from bad to diabolical. In this latest installment of the blockbuster series, time is running out as war between the Olympians and the evil Titan lord Kronos draws near. Even the safe haven of Camp Half-Blood grows more vulnerable by the minute as Kronos’s army prepares to invade its once impenetrable borders. To stop them, Percy and his demigod friends must set out on a quest through the Labyrinth—a sprawling underground world with stunning surprises at every turn. Full of humor and heart-pounding action, this fourth book promises to be their most thrilling adventure yet.

1. I Battle the Cheerleading Squad

2. The Underworld Sends Me a Prank Call

3. We Play Tag with Scorpions

4. Annabeth Breaks the Rules

5. Nico Buys Happy Meals for the Dead

6. We Meet the God with Two Faces

7. Tyson Leads a Jailbreak

8. We Visit the Demon Dude Ranch

9. I Scoop Poop

10. We Play the Game Show of Death

11. I Set Myself on Fire

12. I Take a Permanent Vacation

13. We Hire a New Guide

14. My Brother Duels Me to the Death

15. We Steal Some Slightly Used Wings

16. I Open a Coffin

17. The Lost God Speak

18. Grover Causes a Stampede

19. The Council Gets Cloven

20. My Birthday Party Takes a Dark Turn