| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Bullfighting Bullfighting, Ritual Prostitution and the Theatre: With Some Comments on Substrate | 978-1-877211-52-2 (1-877211-52-4) | 2003 |
| Comparative Linguistics: Indo-European and Niger-Congo | 978-1-877211-59-1 (1-877211-59-1) | 2004 |
| Sumerian Comparative Grammar | 978-1-877211-69-0 (1-877211-69-9) | 2009 |