book covers: the outside of a book, either the front of the book or the spine, showing the binding and any decoration or lettering. Note that older books, especially before 1800 or so, were usually sold unbound: when you bought a book you took it to a book binder, who would make a cover to order, usually to match the other books you owned.
Synonyms:
front covers
See also:
pictures of books, books
