def get_rating_lookup_session_for_book(self, book_id=None):
if book_id is None:<EOL><INDENT>raise NullArgument<EOL><DEDENT>raise Unimplemented()<EOL>
Gets the ``OsidSession`` associated with the rating lookup service for the given book.

        arg:    book_id (osid.id.Id): the ``Id`` of the ``Book``
        return: (osid.commenting.RatingLookupSession) - a
                ``RatingLookupSession``
        raise:  NotFound - no ``Book`` found by the given ``Id``
        raise:  NullArgument - ``book_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_rating_lookup()`` or
                ``supports_visible_federation()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_rating_lookup()`` and
        ``supports_visible_federation()`` are ``true``*