2 * This function should return a URL which points to the book cover image based on ISBN.
3 * Ideally, this should point to some type of added content service.
4 * The example below uses Amazon... *use at own risk*
6 function buildISBNSrc(isbn) {
7 return "http://images.amazon.com/images/P/" + isbn + ".01._SCMZZZZZZZ_.jpg";