incunabulum/cocoon/swaddling clothes/cradle/ incunae , in the cradle/koiman , put to sleep/winding-sheet/koimetarium ( cemetery ) /printed books before 1501 , hence by extension any rare & hermetic book ... introduction no book for sale here was actually printed before 1501 , but they all answer to the description rare and hermetic even the mass market paperbacks , not to mention the xeroxes of unpublished manuscripts , which can not be obtained from any other source !