Percy Jackson and the lightning thief

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Across
  1. 1. person who can drive private
  2. 3. fasten or incapable
  3. 5. of pensive and sadness, typically with no obvious reason
  4. 7. gives advice, priest
Down
  1. 1. astronomy, relating to the sky
  2. 2. A card game for 2 or more players
  3. 3. of Lethe: Lethe means forgetful, a river that runs through the valley of ten-thousand smokes
  4. 4. Friend, pal
  5. 5. Great mother, or nurse
  6. 6. a large amount of people