Across
- 2. Half woman, half snake
- 5. Writing utensil that helps Percy fight Mrs. Dodds
- 7. Echidna and Typhon's son
- 8. The Underworld's watchdog
- 9. Best friend of Percy
Down
- 1. Hair of snakes and eyes that turn you to stone
- 3. Daughter of Athena
- 4. Friend that betrays Percy
- 5. Objects that help Percy, Grover and Annabeth escape the Underworld.
- 6. Person who hated Percy and tried to kill him in the museum