private void returnBook(String bookTitle) {
		for (Book currBook : list) {
			if (currBook.getTitle().equals(bookTitle)) {
				if (currBook.isBorrowed()) {
					currBook.returned();
					System.out.println("You successfully returned "
							+ currBook.getTitle());
					return;
				}
			}
		}
		System.out.println("This book doesn't belong to us.");
	}