Cain's Jawbone

By Edward Powys Mathers

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

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£19.98  + shipping
40 orders

Two Paperbacks

Pre-order two of the infamously difficult puzzles in a pocket-sized paperback for delivery in Feb 2021. Exclusively available from Unbound (in bookshops September 2021).


  • Free Cain's Jawbone pencil
  • 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
Pre-order now