function getBookDetails(isbn) {
  // Query the book database by ISBN code.
  isbn = isbn || '9781451648546'; // Steve Jobs book

  var url = 'https://www.googleapis.com/books/v1/volumes?q=isbn:' + isbn;

  var response = UrlFetchApp.fetch(url);
  var results = JSON.parse(response);

  if (results.totalItems) {
    // There'll be only 1 book per ISBN
    var book = results.items[0];

    var title = book['volumeInfo']['title'];
    var subtitle = book['volumeInfo']['subtitle'];
    var authors = book['volumeInfo']['authors'];
    var printType = book['volumeInfo']['printType'];
    var pageCount = book['volumeInfo']['pageCount'];
    var publisher = book['volumeInfo']['publisher'];
    var publishedDate = book['volumeInfo']['publishedDate'];
    var webReaderLink = book['accessInfo']['webReaderLink'];

    // For debugging
    Logger.log(book);
  }
}