Querying Hardcover using GraphQL

example.php

// Uses "carnage/php-graphql-client": "^1.14" in composer
function QueryHardcover() {
    $client = new GraphQL\Client(
        'https://api.hardcover.app/v1/graphql',
        ['Authorization' => "Bearer meeeeee" ]
       );

    $gql = <<<QUERY
        {
          list_books(where: {list_id:{_eq:1}} order_by:{book:{title:asc}})  {
            book_id, position, book {
              id, title, image {
                url, width, height
              }, pages, rating, slug
              contributions { author { name } }
            }
          }
        }
    QUERY;

    try {
        $results = $client->runRawQuery($gql);
    }
    catch (GraphQL\Exception\QueryError $exception) {
        // Catch query error and desplay error details
        print_r($exception->getErrorDetails());
        return;
    }

    // Display part of the returned results of the object
    return $results->getData();
}