public function listAddressBooks( $limit = NULL, $offset = NULL ) {
        $data = array();
        if( !is_null( $limit ) ) {
            $data['limit'] = $limit;
        }
        if( !is_null( $offset ) ) {
            $data['offset'] = $offset;
        }

        $requestResult = $this->sendRequest( 'addressbooks', 'GET', $data );

        return $this->handleResult( $requestResult );
    }