Doorways in the Sand by Zelazny Roger (1987) Mass Market by Avon Books is available now for quick shipment to any U.S. location! This book is in good condition or better. Over the years we have learned how to provide students with cheap prices on books with fast shipping. We know how overpriced books and textbooks can be so we ensure that our customers have access to those same books at affordable prices. Just complete the checkout process for this book and it will be shipped to you for immediate use.