Geronimo stilton books

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Across
  1. 2. his first book
  2. 5. His nephew
  3. 7. His cousin
  4. 8. What is grandfather william's camper made out of?
Down
  1. 1. What animal is he?
  2. 3. His sister
  3. 4. his assistiant
  4. 6. A detective