Sweaty palms and fingers and nervous browsers have oil on them. They smudge covers and eventually destroy the book's value. Don't list your home address or phone number in the book. You might even find them sitting on your doorstep with a question about the time you reach for your morning newspaper. It has happened.
People are persistent.
Sometimes they are cheap or discourteous enough to call you at any hour with a question. Choose a book title which is sort, specific, unique and positive. If you're a woman, use your initials, disguise your first name and sex in some way. There have been rare instances when women have succeeded in writing, publishing and promoting gambling books. If you're looking at a book cover price, decide carefully.