Harlan Ellison the Edge of Forever (Hardcover) → Paperback ISBN-13: 9780814208922 ISBN-10: 0814208924 Genre: Science Fiction & Fantasy ? Harlan Ellison the Edge of Forever (Paperback) → Hardcover ISBN-13: 9780814250891 ISBN-10: 0814250890 Genres: Literature & Fiction, Science Fiction & Fantasy ? |