Largest Medieval Book

The National Library of Sweden has the largest Medieval book , called the Codex Gigas.

Another curious devotional book from this library has six books within one cover:

This variation of a dos-à-dos binding format allows the resulting volume to be opened in six different ways. Each of the six books in this binding can thus be read separately. The volume is from the late 16th century and comes from the Rogge Library in Strängnäs.

-DD

Source: National Library of Sweden
Sixfold dos-à-dos binding: Book #6

Photo: István Borbás/National Library of Sweden