@book { AzraelsSiegelEinRomantikThriller,
    title = "Azraels Siegel – Ein Romantik-Thriller",
    author = "Markus {Kastenholz}",
    year = "2023",
    publisher = "Bärenklau Exklusiv",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1351662"
}