{
    "id": 155489,
    "slug": "the-hunt-for-the-nazi-gold-secrets-of-the-march-impromptu-code-revealed-karl-hammer",
    "nstc": null,
    "title": "The Hunt for the Nazi Gold: Secrets of the March Impromptu Code Revealed",
    "subtitle": "secrets of the march impromptu code revealed",
    "collection_title": null,
    "collection_part_number": null,
    "annotation": "\"The Hunt for the Nazi Gold\" by Karl Hammer is the investigation of the secret code hidden inside the musical score of the \"March Impromptu\" by composer Gottfried Federlein.\n\nDuring the fall of the German Nazi empire, a large portion of Hitler's treasure went missing. Rumors about this fabled Nazi treasure of gold and diamonds have been circulating for decades.\n\nDuring his investigation, journalist Karl Hammer stumbled upon a piece of sheet music, which he believes  holds the secret to the location of the hidden Nazi treasure. Unable to crack the code himself, he is asking readers around the world to aid him in this endeavor. \nCan you crack the code leading to a treasure of untold riches?\n\nAs reported by Der Spiegel, Yahoo News,  ABC News, the Daily Mail and others.",
    "description": "\"The Hunt for the Nazi Gold\" by Karl Hammer is the investigation of the secret code hidden inside the musical score of the \"March Impromptu\" by composer Gottfried Federlein.\n\nDuring the fall of the German Nazi empire, a large portion of Hitler's treasure went missing. Rumors about this fabled Nazi treasure of gold and diamonds have been circulating for decades.\n\nDuring his investigation, journalist Karl Hammer stumbled upon a piece of sheet music, which he believes  holds the secret to the location of the hidden Nazi treasure. Unable to crack the code himself, he is asking readers around the world to aid him in this endeavor. \nCan you crack the code leading to a treasure of untold riches?\n\nAs reported by Der Spiegel, Yahoo News,  ABC News, the Daily Mail and others.",
    "additional_content": null,
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    "imprint": null,
    "language_code": "dut",
    "original_language_code": null,
    "page_count": null,
    "duration_seconds": null,
    "publication_date_first": "2013-09-26",
    "publication_date_latest": "2013-09-26",
    "cover_url": null,
    "editions": [
        {
            "isbn": "9789038923864",
            "product_form": "ED"
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    "created_at": "2025-09-19T12:42:43+00:00",
    "updated_at": "2025-11-08T00:10:28+00:00",
    "publisher": {
        "id": 221,
        "slug": "uitgeverij-elmar-bv",
        "name": "Uitgeverij Elmar B.V.",
        "created_at": "2025-09-19T12:28:07+00:00",
        "updated_at": "2025-09-19T15:08:08+00:00"
    },
    "contributors": [
        {
            "id": 86561,
            "slug": "karl-hammer-2",
            "key_names": "Hammer",
            "names_before_key": "Karl",
            "prefix_to_key": null,
            "contributor_role": "A01",
            "readable_contributor_role": "Author"
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            "slug": "hannie-tijman",
            "key_names": "Tijman",
            "names_before_key": "Hannie",
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            "contributor_role": "B06",
            "readable_contributor_role": "Translator"
        }
    ],
    "genres": [],
    "subjects": [
        {
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            "subject_code": "686",
            "created_at": "2025-09-19T12:42:43+00:00",
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