@book { DasGeheimnisderBurgherrin,
    title = "Das Geheimnis der Burgherrin",
    subtitle = "Historischer Roman",
    author = "Laura {Bastian}",
    year = "2019",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/504965"
}