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      Godel, Escher, Bach: An Eternal Golden Braid by Hofstadter, Douglas R.
      Godel, Escher, Bach: An Eternal Golden Braid -- Douglas R. Hofstadter - Paperback
      $24.99 $17.98
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      I Am a Strange Loop by Hofstadter, Douglas R.
      I Am a Strange Loop -- Douglas R. Hofstadter - Paperback
      $21.99 $15.98