| title | ISBN-13 | year of publication |
|---|---|---|
| Incoming Asteroid!: What Could We Do About It? | 978-1-4614-8748-7 | 2013 |
| New Worlds for Old | 978-0-7153-7772-7 | 1979 |
| The Stones and the Stars: Building Scotland's Newest Megalith | 978-1-4614-5353-6 | 2012 |
| The Stones and the Stars: Building Scotland's Newest Megalith | 978-1-4614-5355-0 | 2012 |