The Phantom Tollbooth

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Across
  1. 2. Brave watchdog
  2. 4. Boy who is on an adventure
  3. 6. King of Digitopolis
  4. 8. Place where the demons are
Down
  1. 1. Boy who grows down
  2. 3. King of Dictionopolis
  3. 5. The sound doctor
  4. 7. An annoying bug