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Cain's Jawbone

By Edward Powys Mathers

A paperback edition of the world's most difficult literary puzzle

You made Cain's Jawbone a reality. It's available in all good book stores now.
$25  + shipping
1021 pledges

Two Paperbacks

Two copies of the infamously difficult puzzle in a pocket-sized paperback.


  • Room for notes at the bottom of each page
  • Printed 'cut here' lines for those who want to remove pages
  • Attempted solutions will still be marked
  • All correct answers will receive £250 Unbound credit voucher
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