Parse title/name of the book and URL of the book.

    Args:
        html_chunk (obj): HTMLElement containing slice of the page with details.

    Returns:
        tuple: (title, url), both as strings.

def _parse_title_url(html_chunk):
    """
    Parse title/name of the book and URL of the book.

    Args:
        html_chunk (obj): HTMLElement containing slice of the page with details.

    Returns:
        tuple: (title, url), both as strings.
    """
    url = None
    title_tags = html_chunk.match(
        ["div", {"class": "polozka_nazev"}],
        ["a", None, has_param("href")]
    )

    if not title_tags:
        return _parse_alt_title(html_chunk), _parse_alt_url(html_chunk)

    title = title_tags[0]

    url = normalize_url(BASE_URL, title.params["href"])
    title = title.getContent()

    if not title:
        title = _parse_alt_title(html_chunk)

    return title, url