@utilities.arguments_not_none<EOL><INDENT>def search_among_books(self, book_ids):<DEDENT>
self._id_list = book_ids<EOL>
Execute this search among the given list of books.

        arg:    book_ids (osid.id.IdList): list of books
        raise:  NullArgument - ``book_ids`` is ``null``
        *compliance: mandatory -- This method must be implemented.*