piggyback book

“Here’s something special. You may remember a blog I posted about dos-à-dos (or 'back-to-back') books. These are very special objects consisting of usually two books, which were bound together at their, well, backs. When you were done with the one book, you would flip the object and read the other. The dos-à-dos book you see here is even more special. Not only is it a rather old one (it was bound in the late 16th century), but it contains not two but six books, all neatly hidden inside a single binding[…]”

— Erik Kwakkel
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