2001 - Ufos Interplanetary VIsitors (Paperback) ISBN-13: 9780595186945 ISBN-10: 0595186947 Genres: Religion & Spirituality, Science & Math ? 1991 - The Watchers (Paperback) → Hardcover ISBN-13: 9780553287332 ISBN-10: 0553287338 Genres: Religion & Spirituality, Science & Math 10 1990 - The Watchers (Hardcover) → Paperback ISBN-13: 9780553057829 ISBN-10: 0553057820 Genres: Religion & Spirituality, Nonfiction, Science & Math 2 1979 - Andreasson Affair (Paperback) ISBN-13: 9780553273878 ISBN-10: 0553273876 Genre: Religion & Spirituality ? |