The Bletchley Riddle

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Across
  1. 1. A puzzle that needs to be solved,
  2. 3. One of the authors,
  3. 4. A large house,
  4. 7. Lizzie and Jakob's mom,
  5. 9. A country in Europe,
  6. 11. Lizzie's brother,
  7. 12. breaking people got together to do this,
  8. 13. Something that needs to be solved,
  9. 14. Something unknown,
  10. 17. Words, letters or symbols that give a message,
  11. 18. One of the authors,
  12. 19. War Two a war that involved Hitler and the world,
Down
  1. 2. Taking over someones place or space,
  2. 5. Jakob's last name,
  3. 6. Germany soldiers during WWII,
  4. 8. Cipher Used to break codes,
  5. 9. Name in the title,
  6. 10. Searching for her mother Willa,
  7. 15. Something that not everyone knows,
  8. 16. The leader of the Nazis,