1. Books are long. You will need a lot of words. Or flattering photos of yourself.
2. A good book makes sense. Somebody should look into that.
3. Ignore people who criticize your book. Go complain to your mother or the British Royal Family instead.
4. If anyone gives you money for your book, you must spend it at once on sound investments like designer clothes and tropical vacations.
5. If people still complain about your book, you can write articles instead. Articles are shorter than books.