// API callback
ProcessGBSBookInfo({
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  "items": [
    {
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      "etag": "qxSUyedLUxE",
      "selfLink": "https://www.googleapis.com/books/v1/volumes/YCXfDwAAQBAJ",
      "volumeInfo": {
        "title": "Ausnahmeverfassungsrecht",
        "authors": [
          "Anna-Bettina Kaiser"
        ],
        "publisher": "Mohr Siebeck",
        "publishedDate": "2020-04-28",
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          {
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          },
          {
            "type": "ISBN_10",
            "identifier": "316156412X"
          }
        ],
        "readingModes": {
          "text": false,
          "image": true
        },
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        "printType": "BOOK",
        "categories": [
          "Law"
        ],
        "maturityRating": "NOT_MATURE",
        "allowAnonLogging": false,
        "contentVersion": "preview-1.0.0",
        "panelizationSummary": {
          "containsEpubBubbles": false,
          "containsImageBubbles": false
        },
        "imageLinks": {
          "smallThumbnail": "http://books.google.com/books/content?id=YCXfDwAAQBAJ&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api",
          "thumbnail": "http://books.google.com/books/content?id=YCXfDwAAQBAJ&printsec=frontcover&img=1&zoom=1&edge=curl&source=gbs_api"
        },
        "language": "de",
        "previewLink": "http://books.google.com/books?id=YCXfDwAAQBAJ&printsec=frontcover&dq=isbn:9783161564123&hl=&cd=1&source=gbs_api",
        "infoLink": "http://books.google.com/books?id=YCXfDwAAQBAJ&dq=isbn:9783161564123&hl=&source=gbs_api",
        "canonicalVolumeLink": "https://books.google.com/books/about/Ausnahmeverfassungsrecht.html?hl=&id=YCXfDwAAQBAJ"
      },
      "saleInfo": {
        "country": "US",
        "saleability": "NOT_FOR_SALE",
        "isEbook": false
      },
      "accessInfo": {
        "country": "US",
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        "embeddable": true,
        "publicDomain": false,
        "textToSpeechPermission": "ALLOWED",
        "epub": {
          "isAvailable": false
        },
        "pdf": {
          "isAvailable": false
        },
        "webReaderLink": "http://play.google.com/books/reader?id=YCXfDwAAQBAJ&hl=&printsec=frontcover&source=gbs_api",
        "accessViewStatus": "SAMPLE",
        "quoteSharingAllowed": false
      },
      "searchInfo": {
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}
);