def _parse_publisher(details):
    """
    Parse publisher of the book.

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

    Returns:
        str/None: Publisher's name as string or None if not found.
    """
    publisher = _get_td_or_none(
        details,
        "ctl00_ContentPlaceHolder1_tblRowNakladatel"
    )

    # publisher is not specified
    if not publisher:
        return None

    publisher = dhtmlparser.removeTags(publisher).strip()

    # return None instead of blank string
    if not publisher:
        return None

    return publisher
Parse publisher of the book.

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

    Returns:
        str/None: Publisher's name as string or None if not found.