Yet do-it-yourself promotion pays off, if not in huge sales then at least in keeping a good book in print long enough to find its readers. Joyce Goldstein says her editor knows how hard she works to sell the books and will keep that in mind next time he's considering publishing her. Kirk Read promoted his hardback so vigorously that the paperback was bought by Penguin. Holliday gets books from the publisher at a 40 percent discount, so when he sells them himself he not only makes a few dollars, but, more importantly, helps them stay in print.