They became very common in England in the first half of the 17th century.

As you could see, it has a very unusual kind of binding.

This odd binding style is known as dos-a-dos, a French word meaning “back-to-back”.

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Some book binders took the style a bit further.

The image below shows a dos-a-dos binding from 1736 featuring no less than five books.

This is why these volumes are referred to as “upside-down books”.

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The Doubles were published until 1978.

A modern tete-beche published by Ace Books.

Before we go, lets take a look at this complicated specimen bound in the late 16th century.

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It contains six booksall devotional texts printed in Germany during the 1550s and 1570shidden inside a single binding.

The book can be opened from all the four edges in six different ways.

Sources:Wikipedia/Erik Kwakkel/Abe Books

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six-in-one-book-2[3]

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