Write a letter to convince the readers of your monthly magazine that they should buy a special publication featuring ten great mystery stories. If readers order the book, they will receive a free bonus gift; they may return the book within seven days if not satisfied. The hardbound volume consist of 931 pages and has 61 full-color illustrations. The book costs $19.98, payable in three monthly installments of $6.66 with no charge for interest, postage, or handling.