Other ISBN range for Horizon Books: Horizon Books (978-0-9787987-...)
| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1998 | 978-9966-868-17-6 | Marguerita North Lewis | A guide to Lake Baringo and Lake Bogoria |
| 1999 | 978-9966-868-19-0 | Juliet Bell | The prisoner (Sparkle adventure series) |