Lawyer James Connell says prisoner Ammar al-Baluchi had only recently heard of the book after a visiting US congressman told the media it was the most popular book among men held in the top-secret Camp 7.
But Connell and another lawyer for a prisoner in Camp 7 say that was untrue and that prisoners had no access to the book.
Connell says guards gave it to al-Baluchi and he turned it over to his lawyer unread yesterday shortly after receiving it.
A Pentagon spokesman declined comment.