The first books used parchment or vellum ( calfskin ) for the pages. The book covers were made of wood and covered with leather. Because dried parchment tends to assume the form it had before processing, the books were fitted with clasps or straps. During the later Middle Ages , when public libraries appeared, up to the 18th century, books were often chained to a bookshelf or a desk to prevent theft. These chained books are called libri catenati .
Peter Singer is professor of bioethics at Princeton University. His books include “Animal Liberation,” “Practical Ethics,” “The Expanding Circle” and “The Life You Can Save.”
While multiple outlets have reported on Khloe’s pregnancy, the couple has not yet addressed the rumors. [Read more...]
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