Lightning thief crossword puzzle

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Across
  1. 2. Percy’s full first name
  2. 4. a name for the monsters of the underworld
  3. 9. the girl who helps Percy
  4. 12. Percy’s sword
  5. 13. a weapon with three spikes like a fork
  6. 14. the gods
  7. 19. the monster that tortures bad people in the underworld
  8. 20. Percy’s old boarding school
Down
  1. 1. the goat friend
  2. 3. which solstice is dead line for the master bolt
  3. 5. when a god and a mortal have a kid
  4. 6. the entrance place of the underworld
  5. 7. how many heads does Cerberus have
  6. 8. the word for Grover’s flying shoes
  7. 10. Percy’s old home city
  8. 11. the main character
  9. 15. who’s is Percy to Poseidon
  10. 16. Zeus’s weapon that was stolen, the lightning-
  11. 17. the last name of the author
  12. 18. did Percy’s mom die? Ye or no