Across
- 2. Sticky stuff Percy puts in his ears as they pass the Sirens
- 3. What Percy names the Ophiotaurus
- 5. Sorceress who turns Percy into a guinea pig
- 6. Monster Grover is running from in the dream
- 9. Monster disguised as Dr. Thorn
- 11. Nico's father
- 14. Enemy with electrically charged spear
- 15. Mortal met at Hoover Dam
- 16. Fury disguised as pre-algebra teacher
- 18. Evil pet at the Gateway Arch
- 19. Color of "claiming" trident hologram
Down
- 1. Smelly
- 4. Sally Jackson's candy store
- 7. Nancy Bobofit's school
- 8. Old ladies with string
- 10. Owner of the sun chariot
- 12. Tells Percy his mom is Hades's hostage
- 13. New character who joins the Hunters
- 17. Replacement of 16-Across