/** Simply selects the home view to render by returning its name. */
  @RequestMapping(value = "/books", method = RequestMethod.GET)
  public @ResponseBody String getAllBooks() {
    logger.info("Inside getAllBooks() method...");

    StringBuilder stringBuilder = new StringBuilder();
    List<Book> allBooks = bookRepository.getAllBooks();
    for (Book book : allBooks) {
      stringBuilder.append(book.toString());
    }

    return stringBuilder.toString();
  }