| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| How to Build a Flying Saucer: And Other Proposals in Speculative Engineerings | 978-0-13-402461-5 (0-13-402461-3) | 1981 |
| How you can explore higher dimensions of space and time | 978-0-13-444043-9 (0-13-444043-9) | 1984 |
| How You Can Explore Higher Dimensions of Time and Space | 978-0-13-444035-4 (0-13-444035-8) | 1984 |