public function bookDetailsAction(ParamFetcher $paramFetcher)
    {
        $api_key = $this->getApiKey();

        // Prepare API URL, always ask for stats
        $bookId = $paramFetcher->get('bookId');
        $url = "http://isbndb.com/api/v2/json/$api_key/book/$bookId?opt=keystats";

        // Send request
        $result = $this->sendRequest($url);

        // Remove keyId if present
        unset($result['keystats']['key_id']);

        return $result;
    }