Mike's 30th birthday crossword

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Across
  1. 5. Species of the Discworld librarian
  2. 8. Truth-telling device in His Dark Materials
  3. 10. Title for the necromancer who banishes the Dead in Garth Nix's series
  4. 11. Pratchett’s parody of Macbeth witches
  5. 16. Death's granddaughter in Discworld
  6. 17. Incompetent wizard in Discworld
  7. 18. Weapon that cuts through worlds in His Dark Materials
  8. 19. Witchcraft philosophy in Discworld
  9. 20. The main city in Discworld
  10. 21. Guards commander in Discworld
  11. 22. Mysterious particles central to His Dark Materials
Down
  1. 1. Tools used by necromancers in the Abhorsen series
  2. 2. Number of necromancer's bells in Sabriel
  3. 3. Magical creature and servant in the Abhorsen series
  4. 4. Protagonist of His Dark Materials
  5. 6. Author of Sabriel and the Abhorsen series
  6. 7. Magic-users in the Abhorsen world
  7. 9. Star turtle that carries the Discworld
  8. 12. Terry Pratchett's fantasy universe
  9. 13. Magical chest made of sapient pearwood in Discworld
  10. 14. Animal manifestation of a soul in His Dark Materials
  11. 15. The river of death in the Abhorsen series