168:/lib/library.c (/lib/library.c)
(public void) set_plural_book_type(mixed types)
/*
 * Function name: set_plural_book_type
 * Description:   Set the names to be used to identify multiple books.
 *                The argument to this function is passed directory to
 *                the set_pname function on each book instance.
 * Arguments:     mixed types - a string name or array of string names
 */
