Penguin · William Morrow and Company
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Impossible Journey: Two Against the Sahara | 978-0-14-009599-9 (0-14-009599-3) | 1991 | Michael Asher |
| Two Against the Sahara: On Camelback from Nouakchott to the Nile | 978-0-688-08926-9 (0-688-08926-7) | 1989 | " |