How to get book title from ISBN with Knowledge Graph?

Question

I volunteer in a communal library and I'm in charge of the digital transition. I'm using the free and open-source software PMB and I want to automate the retrieval of book titles with the Knowledge Graph API (which is not possible with PMB, or I missed something). Why to use Knowledge Graph instead of ISBNdb or another free ISBN API ? Because none is as complete and qualitative as KG.

For example: I take the ISBN of a French book : 9782884613736 ("Le foot illustré de A à Z"). Not found on ISBNdb.com, etc.

So, on when I google it, the Knowledge Graph returns me exactly what I want :

> Screenshot of what I see

But when i'm using the API :

GET https://kgsearch.googleapis.com/v1/entities:search?languages=fr&query=9782884613736&types=Book&key={YOUR_API_KEY}

{
    "@context": {
        "@vocab": "http://schema.org/",
        "goog": "http://schema.googleapis.com/",
        "EntitySearchResult": "goog:EntitySearchResult",
        "detailedDescription": "goog:detailedDescription",
        "kg": "http://g.co/kg"
    },
    "@type": "ItemList",
    "itemListElement": [
    ]
}

Nothing returned to my GET request. (It works properly if I request the book title, it returns well the informations) I tried with different types according to schema.org : Book, BookSeries, BookFormatType.

Is there a way to use KG API as I want ? I'm totally open to all suggestions (even to use another method to reach my aim).

Thank you.

Answer 1

The ISBN seems to be wrong or doesn't exits on google DB, here's a sample using google books api:

ISBN_10 : 2884610154

https://www.googleapis.com/books/v1/volumes?languages=fr&q=isbn:2884610154

ISBN_13 : 9782884610155

https://www.googleapis.com/books/v1/volumes?languages=fr&q=isbn:9782884610155