By common you mean 18 books have been confirmed worldwide. > Anthropodermic bibliopegy is the practice of binding books in human skin. As of April 2016, The An

By common you mean 18 books have been confirmed worldwide. > Anthropodermic bibliopegy is the practice of binding books in human skin. As of April 2016, The Anthropodermic Book Project "has identified 47 alleged anthropodermic books in the world's libraries and museums. Of those, 30 books have been tested or are in the process of being tested. Seventeen of the books have been confirmed as having human skin bindings and nine were proven to be not of human origin but of sheep, pig, cow, or other animals."[1] (The confirmed figures as of May 2017 have increased to 18 bindings identified as human and 13 disproved. https://anthropodermicbooks.org/ https://anthropodermicbooks.org/