Here it is : the tuto to make yourself a folded book. Whatever you want to write or make a shape. WARNING : this is the original tuto, with all the steps With this one you will make really detailed altered books.
Love Book Folding Book Folding Basics Explained - This lists several lessons to help a beginner learn the art of book folding. It's a great tutorial to learn the art. In the final lesson you are taken though the steps to fold the heart featured on Book
Folded Book Art - Best & Most Clear Tutorial Available