Paperback

A book with a paper cover of heavier, more or less rigid cardboard stock is called a paperback. The cover, completely covered with hand-made paper or colored paper, is a little larger than the leaves of the publication itself and has a hollow back.
Paperback binding has been considered inferior binding as compared to cloth binding, which, however, is not entirely true. It was very popular in the 18th and 19th century, due to its multitude of decoration possibilities. See Insel-Büchlein.
Depending on its quality, a paper binding can be as durable as a half cloth binding. Due to its ornamental value, the paperback, correctly done, is one of the more demanding or challenging bookbinding tasks.