Percy jackson and the olympians : the last olympians / Rick Riordan

1. I go cruising with explosives -- 2. I meet some fishy relatives -- 3. I get a sneak peek at my death -- 4. We burn a metal shroud -- 5. I drive my dog into a tree -- 6. My cookies get scorched -- 7. My math teacher gives me a lift -- 8. I take the worst bath ever -- 9. Two snakes save my life -- 10. I buy some new friends -- 11. We break a bridge -- 12. Rachel makes a bad deal -- 13. A Titan brings me a present -- 14. Pigs fly -- 15. Chiron throws a party -- 16. We get help from a thief -- 17. I sit on the hot seat -- 18. My parents go commando -- 19. We trash the Eternal City -- 20. We win fabulous prizes -- 21. Blackjack gets jacked -- 22. I am dumped -- 23. We say good-bye, sort of.

Only one thing matters now—defeating the Titans. The enemy, aka Kronos in Luke's body + his army, is getting stronger. Everyone gears up for battle and Percy even goes all out by taking a bath in the River Styx, which makes him invulnerable except for one small part of his body (just like Achilles' heel).