If James Joyce and Agatha Christie had a literary lovechild, this would be it. Daily Telegraph A unique hybrid of word puzzle and whodunnit. Literary Review Cain’s Jawbone is a 100 page whodunnit in which six people die. To find out who killed them, the reader must re-order the book’s pages. There is only one correct solution. To date, only three people have ever found it. The story so far… In 1934, The Observer’s crossword writer, Edward Powys Mathers, wrote a unique novel Cain’s Jawbone, published by Gollancz. The title, referring to the first recorded murder weapon, was written under his pen name Torquemada. The story was not only a murder mystery but one of the hardest and most beguiling word puzzles ever published and was only solved by two puzzlers whose names were later revealed in The Observer - but the solution to the problem remained a secret.